iPhone Screenshots


Enter equations as they're written. Easy, intuitive history. Symbolic display. All the functions you could possibly want. Clicky/clacky sounds. Yes.

Calculate is a fully-featured scientific calculator packed with innovative features and carefully designed interface.

With Calculate, calculations can be entered in the order that they would be written on paper. The symbolic feature reduces complicated numbers to simple fractions, integer square roots, and more. Previous calculations can be accessed using a familiar swipe gesture. There's more, trust me: it's preeeetty good.


⋇ Fully-featured scientific calculator
⋇ Simple, elegant user interface
⋇ Full complement of mathematical functions: trigonometry, logarithms, powers, parentheses etc.
⋇ Symbolic mode displays numbers with simple fractional representations as such e.g. ⅝ √2 2π
⋇ Calculation history accessed using a swipe downwards gesture on the display
⋇ Informative error system makes it easy to correct typos
Four different number display modes: normal, scientific form, fixed decimal places, and engineer mode (using a SI prefix such as k for 1000)
⋇ Degree or radian modes
⋇ Your choice of Clicky or Clacky sounds! Sampled from a real calculator!

It's great for scientists, engineers, mathematicians and students.

What’s New

Version 1.2

This app has been updated by Apple to display the Apple Watch app icon.


The world's favourite iPhone calculator is back! I spent the day modernising the code and getting the app working on modern phones.

Sorry about the downtime, and I hope you haven't switched to any other calculator apps. Don't fret. Calculate is back.

Calculate was my first app, released 7 years ago. Here hoping it'll last 7 years more!

Ratings and Reviews

4.0 out of 5
28 Ratings

28 Ratings

costci ,

Black Band

I have the same problem as rlcodyjr, a black band often appears across the screen where it makes it impossible the numbers. Otherwise great app. Best scientific calculator on iPhone.

RoboAndy ,

Great engineering calculator

This is the calculator I've been looking for... finally! I'm an engineer, and use a scientific calculator all the time. When I'm away from my desk, this calculator is a more than capable replacement, so much so that I find myself reaching for my phone instead of my stand-alone calculator. The engineering unit feature is especially useful. This app has just the right number of features, and the price is right. Great app! Highly recommended!

L'Homme Libre.98 ,

FREE and Effecient

This is a good replacement for the calculator installed on the iPhone/iTouch. I have it installed on my iPad Mini too and have used it a lot for Math, Chemistry, Physics, and Accounting. Love the Clacky sound effect when pressing digits and shortcuts to inverses.

5⭐️'s because of its performance and free distribution. It does not crash. This app does not endorse extra money to remove ads or access all its functions. It is made fair and love this calculator.

App Privacy

The developer, Joe Rickerby, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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