MultiCalc: Many Calculators

StepIntoTheCode

About this app

Your phone gives you one calculator. MultiCalc gives you as many as you need.

Keep the grocery total, the rent split and the invoice going at the same time, without
losing one to start the next. Each calculator keeps its own display, its own history and
its own colour, so you always know which one you are looking at.


TWO KINDS OF CALCULATOR

In this app
Adds another calculator to your list. Each keeps its own display and history. Name them,
colour them, and switch between them from the button at the top or by swiping the
display sideways. Works on every phone.

Phone calculator
Opens another copy of the calculator your phone already came with. It opens outside
MultiCalc as its own card in Recents, so you switch to it the way you switch to any
other app. Whether a phone allows this is up to its manufacturer. MultiCalc asks your
device directly and turns the button off, with the reason, where the answer is no.


BUILT FOR THUMBS

Round keys with real space between them, so a slightly off tap still lands where you
meant. Keys respond the moment your finger touches down, and slide from one to the next
to enter several in one movement, the way your phone's own calculator does.


A HISTORY PER CALCULATOR

Every calculator keeps its own tape. Tap any past result to put it straight back on the
display. Export the lot to a text, CSV or JSON file whenever you want, and import a
JSON export back later. Importing merges by name and never overwrites anything.


DECIMAL ARITHMETIC THAT ADDS UP

0.1 plus 0.2 is 0.3, not 0.30000000000000004. Brackets, correct operator precedence, and
percent that behaves the way a calculator should: 50 + 10% is 55, and 200 x 10% is 20.


NO ACCOUNT, NO SERVER, NO ADS

MultiCalc has no internet permission at all. Nothing you type can leave your phone,
because there is no way for it to. No account, no analytics, no advertising, no
tracking. Your calculators live in the app's private storage and nowhere else.

Light, dark and system themes. Free and open source under the MIT licence.

What’s new

First release.

Run several calculators at once, each with its own display, history and colour. Open
extra copies of your phone's own calculator too, where your phone allows it. Round keys
you can slide across, a history tape per calculator, export and import, and light, dark
and system themes.

No account, no ads, no internet permission. Everything stays on your phone.