Fast calculator for iPad, iPhone and Apple Watch that shows the calculation History, includes a Today Extension that allows for fast calculation by swiping down and 3D Touch for quick interactions. Numbers are formatted for your country, i.e. period in the US and comma in Europe.

Ever lost your train of thought half way through a calculation and thought how handy it would be to review your calculations. The aim of this Calculator is to be fast, elegant and simple.

- Smart Apple Watch Calculator included.
- Light weight Today Extension included.
- Calculations shown when input and on tape.
- Key click confirms pressing of buttons, which may be turned off.
- Previous calculation is repeated when the equal sign is pressed.
- Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe. The number of decimal digits may be set in the Settings.
- VoiceOver is supported.
- Calculations Tape may be deleted by Tapping on it.

- To use the Calculator in Extensions, swipe down the screen to reveal Notifications and click on Today, then Edit and select the calculator. The Key Clicks may be turned off in the CalcFast Settings.
- When installing the Apple Watch App, wait while it installs, if it doesn't try again and allow it more time.

What’s New

Version 5.2.1

- Fix for crash with Apple pencil.

Ratings and Reviews

BrarSunny ,

Very nice App.

I have been using it for a few weeks now. The feature I most like is the calculations tape which is fabulous. The reason for 4 star instead of 5 star is that the developer has not contacted me back in reply to my email.

Accesspost ,

simple functions but it has all

This is all I need.

Rachel Bagel with Kaola ,

Best calculator app!

This is the best calculator I have come across. It lets you see a record of your calculations, which really helps you track and tally easily.


Hannes Sverrisson
15 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Hannes Sverrisson


  • Family Sharing

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

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