Calculator

SpinTech Studio

Contains ads

About this app

Calculator & Converters is a fast, clean, all-in-one calculator and converter
for everyday math — no clutter, no sign-in, works offline.

➤ CALCULATOR
• Basic and full scientific modes (sin, cos, tan, log, ln, √, powers, factorial, π, e)
• Tap anywhere in your expression to place a cursor and edit, insert or delete mid-calculation
• Correct operator precedence and live result preview as you type
• Clear, specific error messages — no cryptic "Error"
• Smart parentheses and percentage support

➤ VOICE INPUT
• Speak your calculation ("five plus three times two") and see it appear, ready to check and run

➤ UNIT CONVERTER (8 categories)
• Length, weight, temperature, area, volume, speed, time and data
• Accurate, instant conversions

➤ CURRENCY CONVERTER
• Live exchange rates with offline fallback, so it keeps working without a connection

➤ TIP & BILL SPLITTER
• Quickly work out the tip and split a bill between any number of people

➤ HISTORY
• Every calculation and conversion is saved per section, ready to reuse

➤ CLEAN, COLOURFUL DESIGN
• Modern Material design with light, dark and system (auto) themes
• Colour-coded converters and keypad, smooth haptics

Lightweight, private and ad-supported. No account required.

What’s new

• Faster, more accurate keypad — instant response, no missed key presses
• Haptic feedback & key press sounds with 3 click styles (see Settings)
• Big numbers now show commas as you type
• Smarter operator keys (typing - after + replaces it)
• New in-app number pad for converter & split-bill amounts