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
・Today Widget (In App Purchase)
・Multiple History Tapes (In App Purchase)


・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


・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: calculatorhdpro://

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

4.8 out of 5
6.7K Ratings

6.7K Ratings

SeahawkMoe ,

Nearly Perfect!

Tried many calculators (free & paid). HD Pro surpasses the others by far! The most important thing is, it's incredibly User-friendly. My list of Likes keeps growing yet, my Wish list only has tweaks to 'customize' the Tape.
1. Ergonomic - Easy to access & read. The keys are large enough for clumsy fingers. The screen displays numbers clearly.
2. Can use in Portrait or Landscape modes.
3. History: Retains Tape w/ALL previous calculations. Typically, apps limit history to a certain size.
4. Can use data from tape (the result or as actual input) in current calculations .
Wish List/Customize Tape:
1. Add 'Label/Notation' for each item. This would help user ID calculations among many similar ones or highlight important ones.
2. Editing: Let user Add/Change labels on historical calculations.
3. Deleting: Allow selection of individual Tape items for Deletion (as alternative to 'deleting all').

Currently, one must retain the entire tape if historical results are valuable enough to hang on to. Without the relevant historical data, I'd be recalculating same data a lot & wasting time!

IamSporkette ,

Why is it so hard?

Why was it so difficult to find a good calculator? I went through about 10 of them. It seems inconceivable that Apple didn’t have a calculator app for the iPad. Doesn’t it make sense that you would use split screen in order to load up financial apps and then want a calculator? And not a flashy thing, but a workhorse that can be used without distraction? This is perfect. No ads, no recurring subscription, no distractions, but a tape function, a usable layout, and the ability to use with other apps. Nice job dev. I wasn’t looking for my phone, but I gave it an honored spot on my phone home screen as well.

Twylalalalala ,

Simple and Sweet!!

This is just what I was looking for... 👍
It has percentage % which comes in handy with sales tax! It even has both Basic and a Scientific calculators, and it is Beautiful too! The $ cost is worth having no commercials! And it has the option to have a paper trail. Gives you each item and the total that you can print out! And a correction key to go back and make corrections without starting over! Truly wonderful!
Thank you!
PS. Personally, it would be better to have the "Plus/+" sign be the BIGGEST BUTTON instead of the = button that I use much much less!
Just a thought...


Today Widget
Multiple History Tapes
Organize Your Calculations

In-App Purchases

Today Widget
Multiple History Tapes
Organize Your Calculations


Cider Software LLC
87.4 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
In-App Purchases
  1. Widget $1.99
  2. Multiple History Tapes $1.99


  • Family Sharing

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

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