For the required minimum for a smartphone:

• Android 6 or iOS 12 operating system (though, we highly recommend using at least Android 9 or iOS 13)
• Touch screen
• GPS
• Wi-Fi
• 2GB minimum of RAM (Random Access Memory): 108.5Mo for the App installation and 500Mo (1GB is better) available for pictures stored in your phone's gallery

The App is now supported by tablets as well.