"Learn German " is a application with more than 10,000 multiple choice questions for all learning levels in German.
Suitable for studying and exam preparation:

ZD Certificate, issued by the Goethe-Institut, is an international certificate, accepted throughout Europe as well as in the German speaking countries.

ÖSD Certificate (Österreichisches Sprachdiplom Deutsch):
+ Is the certificate for German Language in Austria with a rating scale similar to the Goethe Institute's
+ Accepted in Austria, Switzerland and some universities in Germany

TestDaF (Test Deutsch als Fremdsprache) is a globally organized and unified German test (similar to English IELTS or TOEFL) for university or postgraduate education in German:
+ Accepted at all universities in Germany.
+ TestDaF has levels (from low to high): TestDaF 3, TestDaF 4 and TestDaF 5.
Also, This app is suitable for you to study the levels of DSH (Deutsche Sprachprüfung für den Hochschulzugang), or TELC (The European Language Certificates)

The app is rich in content, and with multiple-choice exercises for many levels from low to high
+ Beginner: more than 1000 multiple choice exercises
+ High Beginner: over 1000 multiple choice exercises
+ Intermediate: over 1500 multiple choice exercises
+ Advanced: more than 70 classified grammar + 2500 exercises
+ Proficiency: with nearly 50 grammar + nearly 1500 multiple choice exercises.
+ Over 3000 multiple choice exercises for common grammatical structures in German.