iOS:
DEVICES WITH IOS 7 AND BETTER.
Sometimes you may notice problems with performance on older devices with only 512MB RAM (like iPhone 4, iPhone 4S, iPad 2, iPad mini, iPod Touch 5). If this happens please try restarting your device and turn off any applications that may run in the background.
Minimum free space in device memory (before installation): 1.5GB
ANDROID:
IN GENERAL, DEVICES WITH ANDROID 4.0 ICS AND BETTER.
Minimum
320x480
Andreno 200, Andreno 205, PowerVR SGX 540 and equivalent
single-core, 1GHz Cortex-A8 like
512MB RAM
Recommended
1280x720
Andreno 225, Andreno 305, Mali 400, Tegra 3 and equivalent
quad-core, 1,5GHz+ Cortex-A9 like
1GB RAM
Optimal
1280x720
Andreno 320, Andreno 330, Tegra 4, PowerVR SGX544MP3, Mali-T628 MP6 and equivalent
dual-core, 1,2GHz Cortex-A9 like
2GB RAM