[jmcannon]

You can change most variables in CleverDeck's algorithm (the same one Anki uses), as well.

If open source and super customizability are important to you, Anki is probably a better choice for you. For many people, I think having the ready-made decks and a nice interface is more important. And CleverDeck does have some features, like three-sided cards and siblings, that I personally loved in Anki.

[riott84]

Personally I don't think super cuztomizability is that important for me. I prefer to have an out of the box solution with ready-made decks but being able to create my own decks is definitely a nice plus. My favorite aspects going through the app (learning Turkish) is the beautiful and intuitive design. Spaced repetition might sound a bit daunting, but completely got it once I started using the app. Well done, this is definitely something I will use daily and that will improve my learning.