[nebulosa]

As usual with anything that isn't open source, I have significant doubts about the longevity of this. Making a few questions on each article and putting them in Anki is probably more effective and also pretty much certain to still work in a few years time, for free.

[massanishi]

I used Anki before and that is definitely useful for vocabularies or studying for exams.

To give a context, I read about 10 articles every day. Some users do for 40 a day. At that point, Kaffae becomes more useful as a general reflection. Either way, there's nothing stopping people from using both as it fits their need.