When you want to switch between a basic and scientific calculator, you can make the switch with a long press on the screen, instead of having to rotate to landscape mode. Another great feature is the ability to spell out calculations in English and 65 other languages. You can also bookmark a calculation with the date and time to view anytime. One of the best features of the app is the Memory Area, which allows you to store multiple values to reuse across any session with a drag-and-drop gesture.
This offering is a great calculator app for your iPhone, along with the iPad and even Apple Watch.
