Sumhold 4+

Chad Voss

Designed for iPhone

    • 3.9 • 8 Ratings
    • Free

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

This app has been updated by Apple to display the Apple Watch app icon.

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
8 Ratings

8 Ratings

Dark_Athena ,

Best Calculator App, EVER.

Update: I’m still tapping the wrong function buttons. The non-standard layout causes confusion when regularly using other calculators and then this one.

Previous Review: 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!

HandCoding ,

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.

JohnWoltman ,

Great design, could use a few more features

I've turned to this app as a replacement for the abandoned calcbot app. Sumhold is well-designed, but could use: an easier way to clear the input; the X is too far because I hold the phone in my left hand. Also an audible click would be nice when tapping numbers. Lastly, I wish I could flick saved numbers UP just like I flip them down. There is flickering on the red buttons when task switching to and from sumhold on my iPhone 5s. Great app, and I can't wait for future versions!

App Privacy

The developer, Chad Voss, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

You Might Also Like