We recommend the following specifications on Android:
- 1GB RAM
- Android 4.4 (KitKat)
We cannot guarantee these specifications alone will be enough to run the game as smoothly as intended. Devices are made for different purposes, and not all lend themselves well for gaming. Also, the game may be unstable if your phone has a modified OS or a custom ROM.
You can check your phone specifications here
On iOS, your device must have 64-bit support. iPhone 5s and iPad Air are the oldest 64 bit devices so if you have these or newer, then you should be good.