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By Chad Voss

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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

iPhone Screenshots

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Customer Reviews

Best calculator I've used.

One of my biggest frustrations with iPhone has been it's lousy calculator. You type in the numbers and they disappear as they add up so you're never quite sure you've actually punched in the right numbers. With Sumhold, the numbers you've typed in are always there so you can easily spot a mistake and fix it. And if you've got several problems going you can hold onto all your sums without having to get out your pen and paper. I highly recommend this app to anyone who uses a non-scientific calculator even a little bit.

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!


For my daily calculations pricing custom prints for my clients, this is a functional masterpiece. It has a very clean UI that doesn't get in the way. All I could offer for constructive criticism is to suggest lightening the font weight for the total display, and to offer color scheme options, but these are minor design nits. It's a great calculator for basic math.

View in iTunes
  • $0.99
  • Category: Utilities
  • Released:
  • Version: 1.0
  • Size: 0.6 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version: