Top Rated Apps for Common Core Standards:

Common Core Library by WAGmob

Common Core Library by WAGmob:
WAGmob brings you, Simple ‘n Easy, on-the-go learning app for the Common Core Standards.
A great reference for students, teacher and parents to easily “know” and “learn” the common core standards.

Google Play Store details:
Ratings – 3.3
Installs – 1,000 – 5,000
Developers – WAGmob (Simple ‘n Easy)