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 4.4

- Autocorrect extra operators updated to include the minus sign (can still multiply negative numbers with this option enabled by using the plus/minus button).
- Added "Insert Result At Cursor" back to the History Tape action menu.

Ratings and Reviews

4.8 out of 5
4.8K Ratings
4.8K Ratings
Rapplejunk ,

Works well

Big keys, pleasing colors, fun to use!

Dean.787 ,

Nice calculator

(One of the best calculators out there. 12/10/2018 4 stars for that) I feel your on you way to killing your app. Look around.

Developer Response ,

Thanks for your review! Sorry for the number of recent updates, there were a few minor bugs that got introduced while working on a new upcoming feature, and I wanted to fix those as soon as possible.

Zoë Too. ,

Love this App.

I use it all the time on my phone or tablet, it is easy to use and lots of features.

In-App Purchases

Today Widget
Multiple History Tapes
Organize Your Calculations


Cider Software LLC
66.5 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
Rated 4+
© 2012-2018 Cider Software LLC
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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