I have 3 different android devices:
1) LG Optimus version 2.2.2
2) Samsung Galaxy S2 version 4.0.4
3) NextBook 4.0.4
Most every app work on both my Android phones LG Optimus version 2.2.2 & my Samsung Galaxy s2 version 4.0.4 BUT not on the NextBook 7" pro which is also Android 4.0.4 several...