This app is also useful in conjunction with other study materials. Having the tables open on your phone or android device so that you don't have to continually flick back and forth through grammar books while doing grammar exercises. It is also convenient for revision and study in short periods of time in almost any location.
If your studying German for travel, business, pleasure or the Zertifikat Deutsch (ZD) or any other reason, I hope that this app can be helpful for you.
If you want to support the app, please consider purchasing the paid version which does not contain ads, and please feel free to email your suggestions, comments and any problems you find. Thanks :)