Sponsored App Review: My Calculator

September 2, 2014 - Written By Tom Dawson

Description: As you’ve probably guessed from the above image, My Calculator is a little bit more than just a calculator. Rather, it’s a hidden messaging application, that allows you to keep activity on your device private from prying eyes on your device. My Calculator hides a messaging app behind a calculator display and keeps your inbox hidden away from those who would want to spy on your messages. Essentially, you enter a secret code into the calculator and then a messaging app appears. With key things regarding messaging being changed on Android 4.4 KitKat, how does My Calculator still shape up? Read on as we find out.

How it Works: First of all, you’ll need to download My Calculator from the Play Store. Once you’ve done that, you’ll see this icon for the Calculator in your app drawer or on your homescreen.

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Once you go ahead and launch the app, you’ll see a familiar calculator display. In order to get to the messaging app, you’ll need to enter ‘1,2,3 +’ and then hit =.

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If you’re running Android 4.4 KitKat or above, you’ll need to make My Calculator your default SMS application, which can alter how the app works on your device. After all, this will mean you’ll have to swap between SMS apps and make each one a default when you want to text secretly. Rooted users however, can installed My Calculator as a system app or install a patch to get around this though.

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Once you have everything setup in that regard, you can start to send messages to your contacts and they won’t appear in any other SMS app.

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You can also take a look at your call logs and such, too.


The whole app does feel a little clunky, and hastily put together, but the emphasis on privacy is carried through here and there are a whole host of settings to tweak and such to make sure your sensitive info stays out of unwanted hands.

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As a nice added touch, you can even change how the calculator first looks.

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Opinion: On the whole, it’s pretty clear that My Calculator needs some work, the assets used for the UI aren’t designed for high-resolution displays and everything feels a little clunky. Having said that though, the app does what it sets out to do – it delivers an added level of privacy to your call logs and messages, which is perfect for a lot of people. Regardless of why you need to use such an app, it’s nice that there’s this option out there to use and while My Calculator needs some work, it works and works pretty well for those looking to secure their messages and such behind a convenient hidey-hole.


  • Speed (4/5) – I had no issues with how quickly the app ran on my phone, but setting things up on KitKat can take a while.
  • Features (3.5/5) – There’s no denying that My Calculator delivers on what it aims to, but the way things work can take some getting used to and it all feels a little clunky.
  • Theme (3/5) – With a low-resolution UI and some confusing UI elements, it’s more difficult than it should be actually using My Calculator.
  • Overall (3.5/5) – The core concept and execution here is pretty good, and with some focus on a cleaner, more modern UI that’s easier on the eyes and easier to use, My Calculator would be a much better app than it is now.


  • Offers those that are a little security conscious one more layer of privacy to keep their messages away from prying eyes.
  • You can change the look of the app’s front to a different calculator to make more sense to your profession or even to a voice recorder.
  • Delivers on its promise of security and hidden messages, even if the app is a little difficult to use.
  • More than just a hidden messaging app, you can hide call logs and more with My Calculator.


  • Very clumsy to set up on Android 4.4 KitKat or above, making it harder to use than it needs to be.
  • UI is a little difficult to use and could really do with a change of paint to make it look better.

Conclusion: My Calculator is an app that aims to help you hide your messages away behind a secret app and it certainly does that. From there however, it’s clear that the app needs some work. The user interface is clunky and more complicated than it needs to be and if you’re running a version of Android starting 4.4 or above then setting it up takes work, too. Still, the developer is active and we’re sure with time, My Calculator will fully realize what it sets out to achieve.