Calculator HD Pro

Basic And Scientific Calculator
Paid Version
(No Ads)
Free Version
(Ad Supported)


Major update for 2018! This is THE BEST calculator for iPhone, iPad and iPod touch!

・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)

・9 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

・Replace ÷ Button With /

・Replace E Button With 00

・Show Thousands Separators

・Minimum Decimal Digits

・Maximum Decimal Digits


・Font Size

・Equals Repeat

・Left-Handed Mode

URL Scheme



What is the difference between the Paid and Free (Lite) versions?

The only difference is that the Free version has ads.

Do I have to pay for the app on each device I own?

No, you only have to pay once and then you can download it again for free onto all of your devices.

The app is universal and works with both the iPhone and the iPad.

You can also share your purchase with others in your family if you have Family Sharing enabled on your account.

For more information about Downloading Previous Purchases and Family Sharing, please visit Apple at

Why do I keep getting ads after I paid for them to be removed?

The Paid version of the app is a totally separate app, so look for a new icon on your device without the word Lite on it.

Start using the Paid version from now on, and delete the Free version from your device so that you do not open it by mistake.

Here is what the two different icons look like for reference:

Paid Version
(No Ads)
Free Version
(Ad Supported)