A unique and powerful calculator and convertor that adapts to your needs; and with full Apple Watch support.

Use your voice or the custom keyboard to input calculations and unit conversions easily and quickly. Mix units, parentheses, math functions in a single computation. Tap into a catalogue of physical constants quickly. For both casual and scientific use, from the kitchen to the lab.

Use the bundled Apple Watch app to run a full calculator and convertor on your wrist. Designed for easy and quick use.

A beautiful interface alive with animations, a versatile app for every day use.

What’s New

Version 2.0

- Apple Watch support! A full calculator and convertor on your wrist.
- Changed the way the convert button works to a more natural behavior.

Ratings and Reviews

4.7 out of 5
26 Ratings
26 Ratings
ASF2010 ,

Powerful, with a nice tutorial (but tweaks would be nice)

Does so many things, and voice recognition is a great feature. Even in just doing the tutorial, however, I have a wishlist of features. I wish that you could tap-scroll to correct what you have entered in keyboard entry mode. I got so frustrated while doing the last tutorial entry; I must have entered it 5 times before I could get it just right. In combo with this feature, it would be nice if you could click an entry in your history, have it become active again, and then tap-scroll through the entry to modify it. It would also be nice if I could switch between voice entry and keyboard entry without losing what has been entered. It is frustrating to dictate a large string, only to have a recognition error at the end, with my only editing option being to cancel the whole string. Lastly, there is a point in the tutorial where "calculation" is misspelled.

Khun M. ,

Where’s V2.0 ???

Today is October 14, 2018. I just downloaded Newton today expecting to get Apple Watch support. Instead the App Store downloaded version 1.0. There is no Apple Watch support for version 1.0. The Newton app itself seems to be a calculator capable of doing complex calculations and conversions by keyboard or by voice command. Seems to work well. The ergonomics and keyboard layout can be improved however. But I am after the Apple Watch version which is today, not available in version 1.0

realsole ,


This app is a lifesaver. It’s free. And there are no ads! You can calculate much faster when speaking. A couple of requests (1) accept ‘equals’ as a voice command (2) include ability to convert from sq meters to square feet; right now, strangely area can only be computed in acres or hectares, which is not very useful or practical.


Vatche Sahakian
19.8 MB
Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2014-15


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

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