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By Chad Voss

This app is only available on the App Store for iOS devices.


Math done simply.

Sumhold instantly calculates and stores numbers with a streamlined interface and a simple swipe gesture. Need to remember a number? Just swipe it down to the number pad to save it as a button.

Sumhold also keeps track of long calculations in an easy-to-read line. It shows a running total and eliminates confusing buttons present on other calculators.

- Swipe to Remember
- Running Total
- Tracks long calculations
- Automatic parentheses for redability
- Copy/Paste Support

What's New in Version 1.1

The long awaited percent button is finally here! And now Sumhold is a 64-bit app so you won't get those pesky warnings any more. Also I've added anonymous telemetry that you can turn off in the settings.

iPhone Screenshots

iPhone Screenshot 1
iPhone Screenshot 2

Customer Reviews

The most intuitive calculator app

I can’t tell you how stoked I was to see this app come back from the dead! (It had last been updated yeaaars ago.)

The thing that I like best about this app is that it makes setting calculator memories easy. Honestly who can understand what "M+", "M-" and all that mean on a regular calculator? (Not me.) Here, though, you just drag calculated numbers to a shelf, and you can easily drag them back to the calculation line if you need to use them again.

Brilliant app.

The features we always wanted

Light, smart, and just everything missing on other calculator apps you will find it on this app. Great job!

Best Calculator App, EVER.

I've been using this app for years and sent several emails to the Dev to ask (then beg) for a 64-bit version.

Here it is: the 64-bit version you've been waiting for!

UI is clean and logically laid out. Functions beautifully and now includes the percent function. The minor rearrangement of the operation buttons make sense. I am so happy!

Welcome back, Sumhold!

View in iTunes
  • Free
  • Category: Utilities
  • Updated:
  • Version: 1.1
  • Size: 15.3 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: