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Frequently Asked Questions

How do I Subscribe to, or Cancel a Premium Membership?

Make sure you're logged into your account, and then head on over to your Subscription Management Page under your account settings. You will see a button for either cancel or subscribe. Click on the button and detailed instructions will follow.

How do I enter a symbol in the calculator?

Check out our symbols tutorial for a list of symbols that the calculator can understand. Here are a few common symbols:
+ (Addition)
- (Subtraction)
* (Multiplication)
/ (Division)
^ (Exponent: "raised to the power")
sqrt (Square Root) (Example: sqrt(9))
pi (Pi)

Will my iOS or Android app also get upgraded when I upgrade to premium?

Yes, you can login to the mobile app with your upgraded web account to access the premium app.