Top Rated Apps for Common Core Standards:

Fifth Grade Kids Math GuruLite

Fifth Grade Kids Math GuruLite:
Common Core Standards – Mathematics tests (Infinite numbers) for Fifth grade students. Syllabus based on Common Core Standards. Contains 10 Levels to make your Kid Expert. Only 1 Level in Lite and all Levels in Pro. System generated questions and answers, so each time your Kid takes the test, questions are Different.

Google Play Store details:
Ratings – 3.5
Installs – 10,000 – 50,000
Developers – App-raiser