iOS
Minimum:
version: 11.0
RAM: 512MB
Recommended:
version: 11
RAM: 2GB

Android
Minimum:
version: 4.4.2
RAM: 512MB
Recommended:
version: 8.0.1
RAM: 2GB

UWP
Minimum:
version: Windows 10 version 14393.0 or higher
architecture: x86
Recommended:
version: Windows 10 version 14393.0 or higher
architecture: x86, x64

Amazon
Minimum:
version: Fire OS version: 5 (derived from Android Lollipop 5.1)
RAM: 1GB
Recommended:
version: Fire OS 6 (derived from Android version 7.1.2)
RAM: 2GB