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 apps are NOT compatible. Why is this? If they work on my old LG Optimus 2.2.2 and my Samsung Galaxy s2 4.0.4 what makes the NextBook 7" pro 4.0.4 not compatible?
2) Is there software I can get to make the NextBook compatible with the same software that works on my other androids?

Please reply
Thank you
Rich