FSRS 5 Support for AnkiDroid

Dae said that FSRS-5 will come out at the same time on all platforms, so you will simply have to update desktop Anki and AnkiDroid.
As for ensuring that FSRS-4.5 and FSRS-5 are compatible, well…The Only 100% Foolproof Strategy Is Inventing A Time Machine - #21 by vaibhav