iPhone Screenshots


Simple-to-use universal calculator with the fastest fraction-entry system in the world: just swipe your finger to enter a fraction in a single gesture.
Choose 'from-to' conversion pair (e.g. cm-->inch) and for every result you will see how much it is in inches.
For students, parents checking homeworks, woodworkers, carpenters, chefs, scientists, engineers and anybody who needs a powerful calculator natively handling fractions.
- to enter NUMERATOR of a fraction: swipe the number button up
- to enter DENOMINATOR of a fraction: swipe the number button down
- to DELETE numerator or denominator: swipe the DEL button up or down
- to DELETE last digit: tap the DEL button
- to DELETE all: long press the DEL button
- to SQUARE a number: long press the 'x' button
- to SQUARE ROOT a number: long press the '÷' key
- to REDUCE and SIMPLIFY fraction and CONVERT it to decimal: enter the fraction and tap '='
- to view the complete input: SCROLL THROUGH the display with your finger
- to EDIT anything you have entered: tap on the number or operator and delete or add
- to toggle result between PROPER and IMPROPER form of fraction: tap on the result- to use the previous calculation result as an input to the next calculation: don’t delete and just carry on with your calculation after '='
- three basic FREE SKINS for different light conditions
- five more paid skin groups designed for kids, vintage calculator lovers or you name it...
- NO ads, of course. Don't like ads.
Missing a feature? Write us directly from the app and we'll add it! (If reasonable :-).

What’s New

Version 1.0.6

Unit conversion. Calcoolator now automatically converts the result into the unit you choose.
Stability improvements.


Gray Card Studio, spol. s.r.o.
91 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Czech

Age Rating
Rated 4+
© Gray Card Studio, spol. s.r.o. 2017
In-App Purchases
  1. Fancy $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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