Minimum Android requirements

With DJI Fly not working on my new Android phone (too little RAM?), I am looking for another app and Litchi pops up often. There does not seem to be a minimum requirements list, can anyone provide one? e.g. Android version, RAM, storage, CPU speed or type.
BTW, would be nice to have a preview or restricted version for testing compatibility before buying.

Minimum android v5.
Here you can find a list of all supported DJI drones:

Google ‘google play store refund policy’.
or

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