For Apple devices, you will need to be running iOS 10.0 or later.
We also recommend that your device has at least 1 GB of RAM.
For Android devices, you will need to be running a minimum of OS 4.4.
As for Apple devices we would also recommend at least 1 GB of RAM.
For both Apple and Android, the performance of the device can be impacted by its age and use.
If your device meets the minimum requirements but the game is not running well, please try rebooting the device before playing and having only one or two other apps running in the background.