How to find an app is compatible with Intel based Android device or not? Intel based Android devices are in the market now and I am drooling over new Asus Zenfone series (which packs Intel Atom processors). However, I am concerned with app compatibility issues.

If an app is developed using SDK, it'll run on Intel based devices, but if it's developed using NDK, it'll surely not run on Intel based devices as instruction sets are different.

Before purchasing any Intel based device, I want to see my favorite apps/games are compatible with it or not. How to get this info without really testing those apps in a virtual machine?
Bluestacks emulator running on a computer with Intel processor, is a good way to test, Intel processor(x86) based app or game compatibility. 
https://www.bluestacks.com/

Genymotion emulator is also a good alternative
https://www.genymotion.com/