Supermemo has some proprietary algorithms but it's close enough. There's little reason to switch from Anki and Anki generally has the biggest community. If you

Supermemo has some proprietary algorithms but it's close enough. There's little reason to switch from Anki and Anki generally has the biggest community. If you are worried about the minor differences in algorithms, realistically you might benefit as much or more from finetuning your Anki intervals instead.