(Developed by Pomegranate Apps)
Available for: iOS, Android
Price: $19.99

For an app, MathStudio might seem pricey, especially given that most phones already have a built-in calculator. However, MathStudio allows users to do much more than simply add and subtract. The app is a fully usable graphing calculator, much like the ones that retail for over $100, but for one-fifth the price.

MathStudio includes over 200 functions and supports variables, loops and recursion. It is complex enough to be used for college-level physics or calculus, including limits, derivatives and integrals, yet also functions as a simple scientific calculator. The catalog tab breaks down each of the available functions.

The app allows users to create 2D and 3D graphs, as well as graph in space and time. And because it's for mobile it has the added benefit of integrating the touchscreen interface and full-color graphics, to make graphs clear and easy to read.

Alan Jones, VP of Global Sales at Atimi Software, in a blog post for TechVibes notes that apps that concentrate on Science, Technology, Engineering, and Math (STEM) subjects are some of the most sought after on the market due to their ability to make difficult concepts more hands-on and interactive. A mobile developer looking to break into the educational apps business might want to take note.