Kalkyl is just a really good calculator.

• Optimized for quick calculations.
• Simple and intuitive design.
• Haptic feedback (on supported devices).
• Undo and Redo support (shake to Undo).
• Keyboard trackpad mode using 3D Touch (on supported devices), or two fingers on iPad.
• Basic graphing.
• Properly localized number formatting.
• App-wide dynamic type support.
• Accessible.

Terms of Use:

What’s New

Version 2.8.1

Fixes a bug on iOS 11.

Ratings and Reviews

4.5 out of 5
445 Ratings

445 Ratings

I don't do thismuch ,

Great App One Flaw

Overall this is a great calculator that I would definitely recommend, especially because it’s free! As another reviewer said I liked it so much that I deleted the default one. The only flaw is that the shake to undo is finicky at best. Other than that, amazing app!

Developer Response ,

Thank you for your review! 😊

I believe the shake to undo issues you were seeing got fixed in the 2.6 update. If not please reach out via the app.

i like it... A lot! ,

Favorite calculator for classes

I used this calculator almost everyday in my physics class. It helped a lot on class assignments when my actual calculator went missing.
If it wasn’t as power hungry on the device (I think that’s iOS though, since that’s also present in the stock app to a slightly lesser extent), it’d be even better. I do kinda wish there was a landscape view similar to the iPad’s implementation of orientation on larger iPhones. Overall though, it’s my favorite calculator app on iOS!

Developer Response ,

Thank you! 🙏🏼

I’ve been looking into the power consumption and everything points to very low energy usage in 2.7.

The only thing I can find is if you’re using an iPhone with an LCD-display then the dark colors used actually draw more power than light colors, and it could be that the display is on for extended periods of time while studying. I’d recommend turning the display off when you are done with the calculations, and see if that helps. Maybe it helps, maybe it doesn’t. 😊

If the problem persists (or if anyone else reading this is seeing the same thing) please check the Settings app > Battery and see how much Kalkyl really draws. Then contact support at and we’ll figure it out together. 🤞🏻

FromBenjamin ,

Nice app, screenshots misleading

The screenshots in the App Store for version 2.2 refer to graphs that appear with x axis min value 0 and max value 1, listed as 0, -5, 5, 1. I suggest zooming out for the screenshot so that it shows the correctly graphed values (-10, -5, 5, 10). I almost didn’t download the app because it seemed so fundamentally flawed in the screenshots. Once I did download, I see that it graphed correctly. Nice app.

Developer Response ,

Thank you for your review!
The values are actually correct in the App Store screenshots, it’s just that they are cropped. (-1)0 to the left and 1(0) to the right - still, it does look a bit confusing! :)
Have a great day!


nordic io AB
11 MB

Requires iOS 11.4 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish

Age Rating
Rated 4+
© 2019 nordic io AB
In-App Purchases
  1. Kalkyl Pro $4.99


  • Family Sharing

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

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