A colorful calculator with 3D buttons, LOTS of features, and fully customizable.

・Dual-line display - shows the input and result at the same time
・History tape - saves every calculation, time and date stamped
・Memory buttons - shows its value on the display
・Percentage and backspace button
・Scientific functions
・6 layouts (3 portrait, 3 landscape)
・10 color themes
・Multi-line input for really long equations
・Automatic scientific formatting
・Label any calculation in the history tape
・E-mail a calculation or the entire history tape
・VoiceOver accessibility
・iOS 9 Split View
・3D Touch


・Swipe down to see the history tape
・Swipe left or right on the keypad to switch between basic and scientific keys
・Swipe left on the display to backspace
・Swipe right on the display to clear
・Tap & hold on the result to copy
・Tap & hold on the input to move the cursor, copy, paste, convert to E-notation


・Color Theme
・Light Tape Background
・Show Layout Button
・Allowable Layouts
・Show Memory Buttons
・Backspace Button (Solid, Arrow)
・Replace ÷ Button With /
・Replace E Button With Hidden, EE, 00, or 000
・Show Thousands Separators
・Minimum Decimal Digits
・Maximum Decimal Digits
・Font Size
・Equals Repeat
・Left-Handed Mode

URL Scheme: calculatorhdprofree://

What’s New

Version 4.5.1

- Added the ability to show the Memory Buttons only on specific layouts. By default, the Memory Buttons are now hidden on the Tape layouts to allow the buttons to be bigger.
- Fixed issue with Insert Result At Cursor not working.

Ratings and Reviews

4.6 out of 5
32.4K Ratings

32.4K Ratings

Navigator917 ,

Excellent, full-featured calculator

This is the only calculator I've found that has everything I need and more. I use the five-key memory, automatic constant, and paper tape almost every day. The running total on chain calculations is a nice touch. The calculator also has a pretty thorough list of advanced math functions.

The only thing on my wish list is an "ANS" key. Some scientific calculators automatically store the results of the last calculation in a memory register and display the number when the ANS (answer) key is pressed. That is useful if you need to make intermediate calculations before you use the prior answer, and would be a faster alternative to getting the number from the tape. The existing "=" key is longer than it needs to be. Part of that could be used for an ANS key, which would make an already great calculator even better.

Ddraj ,

I absolutely love it!!!

It's the best calculator out there, it's free and I use it every day!! What I love about it the most, is that you see every key you type and you can erase one or more digits if you make a mistake, without retyping everything all over again. Also, the result appears automatically without pressing the 'equal' key. If you do press it, the result will be recorded and you can see it anytime later on the tape. I highly recommend it to everybody and I insisted that all my students downloaded it. It's THAT good!!!! Great job and THANK YOU VERY MUCH for creating this app and offering it for free! Thank you!!

Escape510 ,

My Go Calculator!!

It's an awesome app! Sooo functional! There are 3 great layout choices. What I love most is that whatever function you're doing the answer is showing as you enter the last number! No need to touch the "=" button. You can see the numbers you've entered as you add, sub, etc. Great for checking multiple numbers. How convenient! They thought of the most basic needs for FREE and the ads don't bother me!


Cider Software LLC
79.6 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Dutch, French, German, Hebrew, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish

Age Rating


  • Family Sharing

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

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