The app itself basically supports all possible Android display resolutions (from 240*240 and above) in both portrait and landscape modes. There's a main menu that displays all the different tests that you can choose from. After selecting one, the only way to return to the menu is by pressing your device's Back button. Here is the complete list of features:
To try the app on your Android device, use the button above. I've also made a new section on the blog for this app and maybe any future projects that won't be very complex, you can find it here.