# Description

Scientific Calculator Exp is a powerful scientific expression calculator to evaluate complicated mathematical expressions. 科学计算器EXP提供简体正体中文界面和帮助，完全支持简体正体中文。EXP科学计算器支持所有的安卓手机和平板电脑，支持从1.5到4.0的安卓系统。

This calculator supports 40 diffused mathematical functions. It is also able to record historical inputs and results and evaluate complicated expressions, which are either not supported or hard to input in most traditional calculators. This calculator fully supports all the android phones and tablets from Android 1.5 to Android 4.0.

Input:

User is able to input an expression using keyboard or function buttons, or copy a historical record from history screen or by clicking the output box. An expression is made up of operands, operators, functions and parameters. An operand or a parameter may not be a number, it can be an expression. Blank characters between expression elements, i.e. operands, operators, functions and parameters, do not affect calculation result. Capitalized and uncapitalized characters are both supported. An example of expression is pow(4.01,3.1) *0.0731 + sin(toRAD(sum(17, 21, avg(3.71, log(198.2), -9.99,112.7),abs(-11.2))))/(2!) .

Besides the functions supported, this calculator can also handle the following operators: + (plus sign), - (subtraction sign), * (multiplication sign), / (division sign), ** (power sign), % (percentage), ! (factorial sign), & (bitwise and), | (bitwise or), ^ (bitwise xor), ~ (bitwise not), ! (not), + (positive sign) and - (negative sign).

If user is not sure how to use a function or a operator, he/she can press QuickHelp button and then press the function or operator button or type the function name or the operator by keyboard.

Output:

The output text box shows user the result of calculation. If syntax of the input expression is incorrect, output box shows error message. User can also place last calculation result in the input text box by clicking the output box. If the last calculation result includes error, expression will be put into input box instead of result.

Settings:

1. Bits of precision. This setting determines how many effective bits after decimal points should be shown. For example, if bits of precision is 4, 0.003204876 will be rounded to 0.003205.

2. Scientific notation. This field sets the value range that scientific notation, e.g. 2.1 [10 -37], should be used to show result.

3. Record length. The record length gives out the number of historical calculations recorded by Exp Scientific Calculator.

History:

The history screen shows user the recent calculation history. By clicking one of the records, user is able to place either expression or result into input box, which saves typing time. Note that if result includes error, expression will be put into input by default.

You must install this app before submitting a review.

Google Play reviews now use Google+ so it's easier to see opinions from people you care about. New reviews will be publicly linked to your Google+ profile. Your name on previous reviews now appears as "A Google User".

Write a review

My review

Review from

# Reviews

Helpfulness

Newest

Rating

Helpfulness

All Versions

All Versions

Latest Version

4.4

47 total

5 34

4 7

3 2

2 1

1 3

A Google User

Adverts OK expression calculator but the interface is clunky and adverts make it worse. Calc Etc is much better and is free (no ads either)

A Google User

Well designed calculator. Best to me comparing to others.

A Google User

Expect to see graph support.

A Google User

Good tool for students

A Google User

Great tool. Like it

A Google User

Good but can be improved Says it does complex numbers - but although exp(i) works, log(i) sin(i) etc do not. I have moved to using addi instead.

User reviews

Well designed calculator. Best to me comparing to others.

# What's New

Bug fixing

Improved GUI

# Additional information

Updated

April 9, 2012

Size

198k

Installs

10,000 - 50,000

Current Version

1.3.2

Requires Android

1.5 and up

Content Rating

Everyone

Permissions

Report

Flag as inappropriate Offered By

CYZ SOFT

Developer

# Similar

## Scientific Calculator

PowerCalc is a powerful Android scientific calculator with real look. It is one of the few Android calculators with complex number equations support. Features:

* Real equation view editor with brackets and operator priority support

* Component or polar complex entry/view mode

* Equation and result history

* 7 easy to use memories

* Large universal/physical/mathematical/chemical constant table

* Degrees, radians and grads mode for trigonometric functions

* Fixed, scientific and engineering view mode

* Easy to use with real look

* Advertisement free!

Would you like to have multiline equation editor with equation syntax hightiting, actual bracket highlighting and trigonometric functions of complex argument support? Upgrade to PowerCalc Pro.

* Multiline equation editor

* Equation syntax highliting

* Actual bracket highliting

* Trigonometric functions with complex argument support

Stay tuned! We are preparing new functionalities:

* Unit conversions

* Radix modes

* Help

Found bug? Please contact us to fix it.

If you find PowerCalc useful please upgrade to PowerCalc Pro to support further development. Thank you!

## MyScript Calculator

MyScript

1

With MyScript© Calculator, perform mathematical operations naturally using your handwriting.

Specially designed for Android devices.

Specially designed for Android devices.

Easy, simple and intuitive, just write the mathematical expression on the screen then let MyScript technology perform its magic converting symbols and numbers to digital text and delivering the result in real time.

The same experience as writing on paper with the advantages of a digital device (Scratch-outs, results in real time, …).

Solve mathematical equations by hand without actually having to crunch the numbers yourself

BENEFITS AND FEATURES

- Works on your smartphone (Use your finger or a capacitive stylus with your android phone (Samsung Galaxy phones, HTC, Motorola, Sony Xperia, LG Optimus and others)

- Works on your tablet (Take advantage of the S-Pen with your Galaxy Note, or use any capacitive pen with your Galaxy Tab family of tablets, HTC flyer, Lenovo Thinkpad, Asus transformer and others)

- Use your handwriting to write any arithmetic formula

- Write and calculate mathematical expressions in an intuitive and natural way with no keyboard

- Scratch-out gestures to easily delete symbols and numbers

- Portrait and landscape operation

- Redo and undo functions.

SUPPORTED OPERATORS

Basic operations: +, -, x, ÷, +/‒, 1/x

Misc. Operations: %, √, x!, |x|

Powers/Exponentials: ℯx, xy , x2

Brackets: ( )

Trigonometry: cos, sin, tan

Inverse trigonometry: acos, asin, atan

Logarithms: ln , log

Constants: π, ℯ, Phi.

***

Support website: https://support.myscript.com/

***

Note about permissions:

We are asking permission to access Internet connection; this is to provide users the possibility to watch the video tutorial.

Future releases:

We are taking note of all your remarks and comments, many of you are asking us for equations, you can visit our web demo page, a web equation demo will show to you what we are planning to add in the future, visit:

Equation web demo:

http://webdemo.myscript.com/#/demo/equation

Handwriting recognition web demos:

http://webdemo.myscript.com/#/home

## Panecal Scientific Calculator

Appsys

1

Panecal is a scientific calculator application for technical work such as information engineering, mechanical engineering, dynamics, measurements, and construction, an essential item for engineers and science students.

Panecal scientific calculator can display and correct mathematical formulas. You can use it to check formulas, which enables you to prevent input errors and calculation mistakes. Panecal has functions such as editing and recalculating calculation formulas entered in the past, as well as the capability to use variable memory to only change specific values and do calculations.

A cursor is displayed on the screen, and you can tap the screen or push arrow keys to quickly move to the location you want to edit. Panecal allow you to swipe to scroll through formulas, as well as copying and pasting using long tapping, which makes it a strong and flexible application with an intuitive user interface.

[Main functions]

- Move the cursor by tapping and swipe to scroll through the screen

- Copy and paste

- Can select from a history list of formulas calculated in the past, edit them, and recalculate

- Can calculate binary numbers, octal numbers, decimal numbers, hexadecimal numbers up to 32 bits, and do radix conversion

- Can use M+/M- memory functions and 6 types (A-F) of variable memory

- Arithmetic operations, inverse trigonometric functions, logarithmic functions, power functions, power root functions, factorials, absolute values, and percent calculations

- Can select degrees, radians, or grads for angle units

- Can select from FloatPt (floating decimal mode), Fix (fixed decimal mode), Sci (index mode), and Eng (index is in multiples of 3) for displaying values

- Can set types of decimals and grouping separator settings

- Horizontal screen display

- Check key input with vibration and orange coloring

Panecal scientific calculator can display and correct mathematical formulas. You can use it to check formulas, which enables you to prevent input errors and calculation mistakes. Panecal has functions such as editing and recalculating calculation formulas entered in the past, as well as the capability to use variable memory to only change specific values and do calculations.

A cursor is displayed on the screen, and you can tap the screen or push arrow keys to quickly move to the location you want to edit. Panecal allow you to swipe to scroll through formulas, as well as copying and pasting using long tapping, which makes it a strong and flexible application with an intuitive user interface.

[Main functions]

- Move the cursor by tapping and swipe to scroll through the screen

- Copy and paste

- Can select from a history list of formulas calculated in the past, edit them, and recalculate

- Can calculate binary numbers, octal numbers, decimal numbers, hexadecimal numbers up to 32 bits, and do radix conversion

- Can use M+/M- memory functions and 6 types (A-F) of variable memory

- Arithmetic operations, inverse trigonometric functions, logarithmic functions, power functions, power root functions, factorials, absolute values, and percent calculations

- Can select degrees, radians, or grads for angle units

- Can select from FloatPt (floating decimal mode), Fix (fixed decimal mode), Sci (index mode), and Eng (index is in multiples of 3) for displaying values

- Can set types of decimals and grouping separator settings

- Horizontal screen display

- Check key input with vibration and orange coloring

[Disclaimer]

Please note in advance that Appsys is not responsible for any damage or lost profits caused by the use of this software, or any claims from third parties.

## Fraction Calculator Plus Free

I'm Fraction Calculator Plus and I'm the best and easiest way to deal with everyday fraction problems. Whether you're checking homework, preparing recipes, or working on craft or even construction projects, I can help:

- Wish you could find the time to check your kids' math homework? Now checking fraction math takes just seconds.

- Need to adjust recipe quantities for a larger guest list? Let me adjust your cup and teaspoon quantities.

- Working on a craft or home project in inches? Stop double-or-triple calculating on paper - let me do it once, accurately.

I'm attractive and effective and I make great use of either a phone or tablet display:

- I show your calculations in crisp, clear, elegant type that you can read at-a-glance from a distance.

- My innovative triple keypad display lets you type fast! (entering three and three quarters takes just 3 taps!).

- Every fraction result gets automatically reduced to its simplest form to make your job easy.

- Every result is also shown in decimal to make conversion a breeze.

- It couldn't be easier to add, subtract, multiply, and divide fractions.

Let Fraction Calculator Plus turn your phone or tablet into an everyday helping hand.

This is an ad supported version - our ad-free version is also available.

Fraction Calculator Plus (C) 2015 Digitalchemy, LLC

## IdeaCalc scientific calculator

longbin

1

IdeaCalc is the most humanized calculator in android platform. It's most distinguishing feature is very adaptive to touch screen. It's centralized with multiple function as multi-touch, real voice, expression calculation, hex conversion, unit conversion, currency conversion and so on. What it's pursuing is using simplest operation to implement most powerful function.

Special features include:

- Look up history by gesture

- Two fingers touch to zoom text

- Double tap to full screen

- Save/read the text history

- Support complicated expression

- Continuous calculation

- Real voice result-sounding

- Value intellect copy and paste

- Abundant of constants and functions

- Unique undo and redo function

- Cursor anywhere to calculate

- User-defined data import and export

- Hex convert

- Convert content display (unit convert and currency convert)

Special features include:

- Look up history by gesture

- Two fingers touch to zoom text

- Double tap to full screen

- Save/read the text history

- Support complicated expression

- Continuous calculation

- Real voice result-sounding

- Value intellect copy and paste

- Abundant of constants and functions

- Unique undo and redo function

- Cursor anywhere to calculate

- User-defined data import and export

- Hex convert

- Convert content display (unit convert and currency convert)

## Classic Calculator

This application has been designed and engineered for easy operation at any level. The natural display and enhanced features makes it versatile and the perfect choice for high school and college students alike.

* Multi-skin

* Copy clipboard

* Percentages

* Memories

* Trig functions in degrees, radians or grads

* Fixed-point display modes

* Configurable digit grouping and decimal point

* Degrees, minutes and seconds.

* Adjustable size digit

## Electric Calculator

Soft Brains do not want you to waste your precious and important time by calculating formulas relating to Electric field. This Electric Calculator will help you to calculate:

* Power

* Resistance

* Voltage

* Current

You have to just enter values of corresponding formula and Electric Calculator will calculate it for you. Main activity contains 4 options of which each comprises of further sub three formulas. Simply select one of the formula by clicking radio button and save your precious time. So download it right now.

## Scientific Calculator for FREE

Our scientific calculator is provided to you in full and for free. Do you have difficulty in calculating scientific matter you do not worry use scientific calculator application. This complete calculator is helpful for you as a student to find a precise mathematical results. Can have quick access to certain mathematical functions when needed, so that the right choice for you

Scientific Calculator we have features such as:

* The history with this feature you can see the history of the previous results,

* Memory Features

* Traditional algebraic or RPN operation

* Result history * Unit conversions

* Physical constants table

* Percentage

* Binary, octal, and hexadecimal (can be enabled in Settings)

* Trig functions in degrees, radians or graduate

* Scientific, engineering and fixed-point display modes

* Configurable digit grouping and decimal point, and many others in the full scientific calculator

## Scientific Calculator Free

Scientific Calculator Free - Scientific and Graphing Calculator

This is a fully featured scientific and graphing calculator which supports graph, matrix, complex numbers, equation solver and unit converter. For everyday calculations, the calculator also supports a basic mode.

Features:

* Large input/output display

* Dedicated Graph Plotter

* Advanced Unit Converter

* Complex number

* Full Matrix Support up to order of 9x9

* Simultaneous linear equation solver up to 9 variables

* Polynomial equation solver - gives both real and complex solution

* Landscape Mode

* Calculation History

* All Trigonometric operations

* Degree, Radian, Grade

* Binary, Decimal, Octal, Hexadecimal operation

* Bitwise operations

* Ten memory locations

* Results history feature

* Constants Table

* Built-in help (accessible via options menu)

Upgrade to ad-free version of Scientific Calculator to remove ads: https://play.google.com/store/apps/details?id=com.scientificCalculatorPro

If you find this calculator useful, please consider upgrading to the ad-free version to support further development.

If you have any suggestion or comments about the calculator, please email us.

## New Scientific Calculator

super im

1

New Scientific Calculator is a powerful Android scientific calculator with real look. It is one of the few Android calculators with complex number equations support.

Functions include:

* General Arithmetic Functions

* Trigonometric Functions - radians, degrees & gradients - including hyperbolic option

* Power & Root Functions

* Log Functions

* Modulus Function

* Random Number Functions

* Permutations (nPr) & Combinations (nCr)

* Easy to use with real look

Dont Forget to share with your friend

tag : scientific calculator,scientific calculator for android,scientific calculator apk,calculator math

## Calcularis Scientific Calc

Calcularis: The only scientific calculator you will ever need.

A history feature will allow you to save as many equations as you need and allow you to retrieve them when needed or edit them. No need to press the = button because Calcularis is always calculating.

The full equation with multiple lines makes it easy to keep track of what your are calculating. All the standard scientific functions are on visible keys. There is a scientific and engineering notation mode as well.

Simply the the best free scientific calculator on the market.

The paid mode has the following additional features:

* applications such as Tip and split calculator, Loan calculator, math equations like quadratic equation.

* large set of constants

* unit conversions

* more functions accessed from the FN button

* more key layouts such as a 10 Key and Programmer/logical calculator accessed from the KEYS button

During the trial period (two weeks), you can use the features of the paid mode to try them out. After the trial period, the main features of the calculator will continue to work and will remain free.

Move over RealCalc, the new #1 Android scientific calculator has arrived. Some have asked the question whether you still need your TI, HP, Casio or Sharp calculators. The answer is yes. Phones are not usually allowed in the classroom or in testing centers. You will always need your old calculator for that. Plus calculators like TI-83, TI-84, TI-89 and TI-Nspire include graphing capability that is not currently supported.

## Advanced Calculator-Dotools

Dotools

1

A prefect Calculator, based on iphone's users experiences and miUI's style.

Memory consumption:2.6M,start up quickly.

Applicable occasions:

-House loan calculate

-Shopping budget calculate

-Dining fee

-All kind of charges

-A calculator in upper primary mathematics,juior mathematics,senior mathematics.

-A calculator programming for chemistry,biology,physics,math,mathematics and the life sciences.

Memory consumption:2.6M,start up quickly.

Applicable occasions:

-House loan calculate

-Shopping budget calculate

-Dining fee

-All kind of charges

-A calculator in upper primary mathematics,juior mathematics,senior mathematics.

-A calculator programming for chemistry,biology,physics,math,mathematics and the life sciences.

Dotools series products win Du Battery Saver & Du Speed Booster recommended

THE KEY FEATURES:

-Arithmetic,four fundamental opreations.

subtraction,addition,multiplication,division.

Add,subtract,multiply,divide.

3 × 2÷ 1+ 6- 9=3 or 3*2/1+6-9=3

-trigonometric function.sin,cos,tan,cot

sinus cosinus tangens

sin30°=1/2=0.5

cos90°=1/2=0.5

tan45°=1

cot45°=1

-logarithm,logarithmic calculate.log,lg,ln,e

ln natural logarithm is the logarithm to the base e

lg10=1 lne=1

-conditions in parentheses are evaluated first

3 × 2÷ 1+ （6- 9）=3

-square root:√4=2

-power calculate:2^3=8

-extraction of a root

-factorial: 4!=24 , 6!=1*2*3*4*5*6=720

-decimal point: 0.2+10.8=11

-pi constant,π

-percentage

-history stores the last 50 results

-setting precision the expression

-no ads，no advertisements

-percentage

-1 mode:standard calculator

-2 mode:scientific Calculator

IF YOU LIKE THIS APP PLEASE RATE IT.

IT MOTIVATES US TO FURTHER IMPROVE THE APP AND WORK ON NEW INNOVATIVE FEATURES.

THANK YOU IN ADVANCE

## Scientific Calculator

TechCalc contains 12 computing modes in one application + a handy reference section.

Modes included are:

Modes included are:

* Basic Mode,

* Scientific Mode,

* 64-bit Programmer Mode (Hex, Oct, Bin and Dec),

* Graphing (save copy of graph to sdcard),

* Matrices,

* Complex Numbers (cartesian, polar, using Euler's identity),

* Quick Formulas,

* Quick Converter,

* Time Calculator,

* Equation Solver,

* Calculus (Derivative, Definite Integral, Taylor Series & Indefinite Integral) - requires Android version 2.3 or higher

* Financial

+ the Periodic Table of Elements!

Features include:

* All Trigonometric operations (radians, degrees or gradients)

* Powers & Roots

* Logs and Antilogs

* Factorial, Modulus & Random Numbers functions

* HCF, LCM, Prime factorization

* Pol() & Rec() Functions

* Permutations (nPr) and Combinations (nCr)

* Statistics

* Fractions Mode

* A wide range of conversion categories and constants

* 20 Memory Registers in each of the calculation modes

* Detailed calculation history

* Extensive Help and Reference

* Highly customizable via the Settings

The reference section includes:

* Physical Laws

* Names in the Metric System

* Mathematical Tables

* Elementary & Linear Algebra

* Trigonometric Identities

* Differentiation & Integration Rules

* Statistics Formulas

* Vector Mathematics

* ASCII, Fractional Bits & Roman Numeral Converters

* pH, Interpolation, Body Mass Index (BMI) & Proportion Calculators

* Sigma & Pi Notation

Please email any questions that are not answered in the Help section.

This is an ad-supported app - upgrade to an ad-free version for USD 0.99 (or the equivalent in local currency) via https://play.google.com/store/apps/details?id=com.roamingsquirrel.android.calculator_plus

## CALCU™ Stylish Calculator Free

Express your style with the calculator made just for you. Choose from 12 colorful, stylish themes to brighten your day while you calculate with ease.

CALCU™ is a breeze to use for everyday calculations, with all the scientific capability you need for work and school just a swipe away. And for your most demanding needs, CALCU™ allows you to add or remove the functions and constants you need to make the perfect calculator designed by you, for you.

The Droid Lawyer rates CALCU™ 4.5 out of 5, calling it “a great replacement for Android’s stock calculator”... and we couldn’t agree more!

CALCU™ offers all the regular and scientific calculator functions in a simple, stylish and easy-to-use app. Download it for free today!

Features

★ Beautiful and intuitive interface with gesture based control and navigation

★ See instant results of your calculations as you enter them

★ Swipe up on the keypad to reveal scientific keypad

★ Swipe down on the display to see calculation history

★ Swipe up on the scientific keypad to customize it

★ Create user-defined constants

★ Choose between simple and full keypad layout

★ Choose from 12 stylish themes

## Scientific Calculator

The app is a powerful Android scientific calculator with real look. It is one of the few Android calculators with complex number equations support. Features:

* Real equation view editor with brackets and operator priority support

* Component or polar complex entry/view mode

* Equation and result history

* 7 easy to use memories

* Large universal/physical/mathematical/chemical constant table

* Degrees, radians and grads mode for trigonometric functions

* Fixed, scientific and engineering view mode

* Easy to use with real look

* Advertisement free!

Would you like to have multiline equation editor with equation syntax hightiting, actual bracket highlighting and trigonometric functions of complex argument support? Upgrade to PowerCalc Pro.

* Multiline equation editor

* Equation syntax highliting

* Actual bracket highliting

* Trigonometric functions with complex argument support

Stay tuned! We are preparing new functionalities:

* Unit conversions

* Radix modes

* Help

* Real equation view editor with brackets and operator priority support

* Component or polar complex entry/view mode

* Equation and result history

* 7 easy to use memories

* Large universal/physical/mathematical/chemical constant table

* Degrees, radians and grads mode for trigonometric functions

* Fixed, scientific and engineering view mode

* Easy to use with real look

* Advertisement free!

Would you like to have multiline equation editor with equation syntax hightiting, actual bracket highlighting and trigonometric functions of complex argument support? Upgrade to PowerCalc Pro.

* Multiline equation editor

* Equation syntax highliting

* Actual bracket highliting

* Trigonometric functions with complex argument support

Stay tuned! We are preparing new functionalities:

* Unit conversions

* Radix modes

* Help

## Smart Scientific Calculator

Softrain

1

Smart Calculator, It is All-in-one!!

- Scientific Calculator Mode.

- Computer Calculator Mode.

- Statistics Calculator Mode.

- sin, cos, tan, sinh, cosh, tanh, π, log, Mod, Exp,,,

- +, -, /, *, %, ±, √, 1/χ, χ², χ³, Int, Inv,,,

- Degree, Radians, Grads,,,

- ROL, ROR, LSH, RSH, Not, XOR, OR, And,,,

- HEX, DEC, OCT, BIN, QWord, DWord, Word, Byte,,,

- Σχ, Σχ², η, e, Qp, Q1, Q3, q, χ!, D+, D-,,,

# More from developer

## Smart Photographic Calculator

CYZ SOFT

1

Smart Photographic Calculator is a powerful tool to recognize (back camera is required), analyze, solve and plot mathematical expressions. It supports printed math expression recognition, complex number, matrix, (higher order) integral, unit conversion and 2D/3D/polar chart plotting. It is based on a powerful math engine, MFP programming language. However, to make it easy-to-use, user is not allowed to define functions.

Smart Photographic Calculator supports basic arithmetic operations like +-*/, mixed and complex fractions and power (80% accuracy), multi-variable linear equations (80% accuracy, variable name should be x, a, b, c or y), polynomial (80% accuracy, variable name should be x, a, b, c or y), (first level) integral (70% accuracy), summation (80% accuracy) and basic matrix calculation (60% accuracy). Operator can be complex values. Note that handwriting math recognition is still in beta stage.

A few questions users might ask:

Q1. Why this app recognizes math expression slower than some similar apps like photomath?

A: This is because we think more. Math expression can be extremely complicated. It can include left and right upper notes, foot notes, top expression and bottom expression. Moreover, several expressions can be combined to construct a matrix or a linear equation group. As such, difficulty is not identifying individual characters, but analyzing the structure. Photomath is very swift because it does not support very complicated math structure so that it avoids to analyze a lot of things.

Nevertheless, if just recognizing simple calculations the above analysis is not needed. To this end we are working to apply different modes to math recognition. Primary school student will soon find that Smart Photographic Calculator becomes much faster in the future releases.

Q2. Can this app recognize expressions within noisy background or from text?

A: This app has reasonable capability to filter off noise and irrelavant text. However, we cannot garantee to remove all the noise and irrelavants. So please try to take photo of math with clear background, like white paper or computer screen. Also note that camera should not be place too close to computer screen because it will see a lot of pixels.

User may argue that Photomath is able to extract expressions from irrelavant text. This is true. But seems that Photomath identifies an expression by counting the digits in the text. We cannot rely on this criterion because, very possible, a math expression may include no digit at all. But we promise our algorithm will work better in future releases.

So far our algorithm is good at handling simple expressions including only arithmetic operations. But for matrix and multi-linear expressions things are different. So if user wants to calculate expressions with matrix or multi-linear expressions, ensure a clear background first.

Q3. What are other requirements to recognize math properly?

A: First, this app can only recognize STANDARD math expressions. It cannot read text or do some calculation based on special format. As such, if user scan the following text:

what's the value of 2 plus 3?

, it will return nothing.

Also, user has to ensure that expressions are printed clearly and no shaking when taking photo.

Third, camera should not be too far away from expression and keep right angle to take photo. Otherwise if character size is too small or image of expression is inclined, nothing can be recognized.

Finally, user could retry math recognizing several times to get expression recognized.

Q4. Please show me some examples that Smart Photographic Calculator can work.

A: In the google play snapshot, we show several examples. User can also visit the following photomath website:

https://photomath.net/examples

, and try to recognize each expressions in Photomath's example list. Our app is able to process all of them except 32:8 because : is not a valid operator in Smart Photographic Calculator.

## Scientific Calculator Plus

CYZ SOFT

1

Scientific Calculator Plus is a powerful mathematical tool to do mathematical analysis and evaluate complicated mathematical expressions similar to Matlab. More than Matlab, it has capability to take photo of printed math expressions and recognize them to do further analysis. It supports complex number, matrix, (higher level) integration, 2D, polar and 3D chart, string, programming (using a easy-to-use language called MFP), file operation and unit conversion. It can run in both Android phones and tablets, PC or MAC with JAVA ready (Scientific Calculator for JAVA does not support math recognition).

Main capabilities:

1. Math recognition: User enter into Smart Calculator and then click the camera button to take photo of one or more than one printed math expressions to recognize. User is able to choose to calculate or plot graph or simply use the recognized text as input. Comparing to Photomath, Scientific Calculator Plus is a bit slower at recognition speed. However, it supports a lot more expressions types than Photomath. And it is able to plot chart of expressions.

Scientific Calculator Plus supports the following expressions: 1. Addition; 2. Subtraction; 3. Multiplication; 4. Division; 5. Fractions; 6. Roots; 7. Multiple linear expressions; 8. Trigonometry; 9. Polynomials; 10. Exponents; 11. Algebra; 12. Integration; 13. Summation; 14. Product; 15. Matrix and 16. Complex value. User can also send email to us if the recognized result is not satisfactory.

2. Back-end math engine: Scientific Calculator Plus supports complex number, matrix, integration and is able to solve multi-variable linear equations, polynomials (up to 6 order) and other simple functions.

Example to input matrix: [[1,2],[3,4]], where [1,2] and [3,4] are 2 rows in the 2*2 matrix.

Example to input complex number: 8.71 - 5.44i where i is the image unit, the times operator, which is *, between 5.44 and i can be ignored. If ignored, no space is allowed between 5.44 and i;

Example to input integral: integrate("x**2", "x", 0, 1) (definite integral of x square from x = 0 to 1) or integrate("x**2","x") (indefinte integral of x square).

3. Graph engine: This app is able to plot 2D, plor or 3D chart. In smart calculator, user inputs the expressions and Scientific Calculator Plus automatically identifies the number of variables (2 variables means 2D chart or polar chart, depending on variable name; 3 variables results in 3D chart) in the expressions and draws corresponding graph. Scientfic Calculator Plus also provides stand alone tools to draw complicated graphs and a set of functions to draw charts from command line.

4. Programming: This app is actually a shell of programming language called MFP. This language internally supports string, complex number and matrix and is able to call all the built-in functions and all the user-defined libs stored in AnMath/scripts folder in SD card. This programming language also provides a complete set of file operation functions and time / date functions. Theoretically, user can do anything using this programming tool in an Android device.

Main components:

1. Smart calculator: User can take photo to recognize math (printed only), do any calculation or plot graphs using this tool. An internal calculator assistant can convert units and return constant values. Its input pad is configurable. User can add his/her own function buttons.

2. Command line: A matlab like tool for advanced users. User inputs functions line by line and run. Its key board is also configurable.

3. Integration and plotting graphs: Tools calculate complicated integrals and plot various graphs.

4. Scientific Calculator for JAVA: It is included in Scientific Calculator Plus for Android. User is able to connect the mobile device to any PC or MAC via a USB cable, copy SDcard\AnMath\ folder to his/her own directory and launch the JMathCmd.jar in it. Note that SCP for JAVA is not able to recognize math expressions.