Count on Calculator: Simple and Powerful, with big buttons for daily calculations. Start Calculating Now!

Calculator combines the Standard & Scientific calculator, with extensive & easy functionality options. Calculator is Fast, Accurate and Beautiful, it's everything you need right in the palm of your hand!

• Basic Calculation Buttons
• Mathematical / Scientific Buttons - hidden in iPhone portrait view
• Calculate with Degrees or Radians
• Percent Button
• Memory Button
• History View: Save, Copy & Forward
• Backspace Button - Slide/Swipe the Result Screen or use the Back Button
• Quick Equation View
• Split View
• Hand off support (continue calculation on other devices via spotlight or app manager)

Addition, Subtraction, Division, Multiplication, Percentages
Cubic Exponent, Cubic Root
Engineering Exponent
Nth Exponent, Nth Root
Power of E, Power of Ten, Power of Two
Square, Square Root
Natural Logarithm, Common Logarithm, Binary Logarithm
Sine, Cosine, Tan
Arc Sine, Arc Cosine, Arc Tan
Hyperbolic Sine, Hyperbolic Cosine, Hyperbolic Tan
Hyperbolic Arc Sine, Hyperbolic Arc Cosine, Hyperbolic Arc Tan
Multiplicative Inverse, Random Number Input, Factorial

As always, we appreciate your feedback.
Please email us at with any suggestions or questions.
If you are happy with this update, please let us know by rating and reviewing us in the App Store!

-- COUNT ON --

What's New

Version 3.2.14

• We update our app regularly to fix small bugs that you wouldn't necessarily notice
• We've added iPhone X marketing material

Ratings and Reviews

4.7 out of 5
82.8K Ratings
82.8K Ratings

Simple App with Nice Features, but needs Ad Free Option

I like this more than Apple’s default Calculator. Since a recent iOS upgrade, Apple’s Calculator became less responsive. Installed Calculator HD, and enjoyed the simple design and the “History” feature. I can’t tell you how many times I forgot what I just calculated only to wish I had some sort of “back” button.
A major draw back to this App is that it is loaded with ads. There’s a banner on the bottom, and a full screen ad pops up almost every time you load it up. I don’t want ads, and I’m willing to pay a one-time fee to get rid of them, but there isn’t any option like that. The developers also make another Calculator app, but that requires a monthly fee. I think that’s outlandish. I don’t want to pay a continuous fee for a Calculator. That’s ridiculous.

Developer Response

Thank you for your feedback. We always appreciate to hear from our users, and do our best to use this to improve our free apps. We have already reduced the advertisements in our apps as a result of this. We will continue to monitor the reactions of our users to better balance the ads, so we can offer the best experience possible. We will take your feedback into account for this as well, and are available for more feedback and suggestions at

If you would like to remove the ads then you can do so by purchasing the Pro version of the app. This can be found in the App Store by searching for ‘Calculator HD Pro’ and has the same functionality but without the ads.

Connie Lei :)


I'm now in the fourth grade and math is pretty tough now. With this, it is so much easier to use than REAL calculators. This is the most USEFUL app that I actually have on my iPad 😂🤣
But seriously though.....My AM class teacher ( morning class ) gets mad when the class or a student either gets confused with math, makes a mistake, or doesn't understand. Ok FIRST of all you need to understand that we are just a bunch of 9,10 or even 11 year olds are just kids and we need a few steps to getting to know a strategy. This is friggen a-maz-ING!!!!!,


Just a normal calculator.

I just needed a calculator. They don’t seem to make them anymore. They are all so complicated. This is really easy to use. It keeps track of what you have recently done so you can your work while you are using the calculator. Kind of a safety measure if you get interrupted while using it. Cool 😊 It also has a scientific calculator for those who need that you can switch too that one if that is what you need. I really appreciate that they are separated. Thank you for thinking of all of us.


Impala Studios B.V.
77.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Dutch, French, German, Greek, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese
Age Rating
Rated 4+
© Impala Studios


  • Family Sharing

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

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