On the surface, the default iOS Calculator app seems very simple. But, there are a few tricks up the Calculator app's sleeve.

Unlock the full potential of your iPad calculator app with our beginner's guide on how to use math notes on iPad. See how it can automatically calculate math equations and show results as you write.

Google has rebuilt Chrome OS's built-in Calculator app, making it available for all devices, not just Chromebooks.

Learn how to convert distance, currency and more in Calculator without internet or any another app.