iPhone Screenshots


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

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.

Ratings and Reviews

3.9 out of 5
7 Ratings
7 Ratings
Dark_Athena ,

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 makes me tap the wrong one, but it’s a minor eye roll. I am so happy!

Welcome back, Sumhold!

pajamatimetao ,

There's absolutely no reason to use this

This is essentially a lazy programmer being lazy with his apple developer account. Nothing about this calculator is unique or better than the built in calculator in iOS.


I'm a picky person. ,

Now this is simple

WAIT... did you change the placement of the buttons? Is the plus the same way it always was? How come I'm making so so many mistakes now when before the update I never made a mistake.
I'm aware you added the % sign. It's not it.
Please let me know asap


Chad Voss
15.3 MB
Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Chad Voss


  • Family Sharing

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

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