คำอธิบาย German Grammar Practice

Important Update 25.01.2016!
I'm releasing the full code of the app as open source in:
https://github.com/seuribe/germangrammarapp/
It's a slightly older version, not the latest beta, and it was stripped of the code or advertisement and some other parts, but it's mostly complete.
I have no more time to dedicate to this app, and as long time users know, I hate the state of some of the exercise generators but there is unfortunately not much I can do now.
If anyone wants to contribute, I'd be welcome to accept code and database contributions.
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Do you need to practice your German language, but cannot find enough exercises?
In this application you will find an almost infinite amount of exercises to practice german and improve your grammar.
With hundreds of words in it's database, and several exercise types, it will be a long time before you run out of exercises to practice.
It contains also simple charts for the most important conjugations and declensions, and links to external Wiktionary.org for more in depth information.
We recommend you use this application as a complement for other studying material, and consult with your teacher.
If you find an error, or have a suggestion, please use the included feedback form in the exercises. We'll be happy to address your suggestions.
We are working on a new version with important changes, including:
* User generated exercises
* Better register of your track record
* Improved usability
If you would like to join the beta, please go to https://play.google.com/apps/testing/ar.com.inmune
Be aware that beta versions might have bugs and be less stable than the latest release.