SpaceTime is the most powerful calculator ever made for mobile devices with 2D, 3D, and 4D graphing and MobileCAS Technology for algebra and calculus.

From the high school student to the professional engineer, SpaceTime allows you to explore ...

THRZ Finder is a simple application for finding your target heart rate zone. Useful for monitoring your exercise, weight loss, or medical conditions!

Yet Another Unit Converter - can convert 39 different units!