Given that I’ve wanted to make apps for learning languages but always get lost in the weeds of various spaced repetition algorithms - would love this kind of op

Given that I’ve wanted to make apps for learning languages but always get lost in the weeds of various spaced repetition algorithms - would love this kind of open source resource. If anyones interested in making this kind of thing, I’d love to chip in. For example I notice it’s really common for spaced repetition algorithms to really easily allow me to shoot myself in the face by learning too much up front and then drowning in reviews; or to destroy myself by missing a few days. Not sure what is out there, but some extensions I’d like as a user is to be “I don’t want to spend more than x time per day doing this, so pace me please”, things like: - the ability to specify a max “learning load” taking into account projected reviews + new cards - the ability to “recover” from missed days not by seeing 1000 pending reviews and panicking, but by saying “do an extra 10 cards a day and in two weeks you’ll be caught up” I’m sure I’m not the first one to think of these things but I don’t know how to research what people have done - and if these kinds of usability things, good documentation with clear comparisons of strategies, flexibility of use in different environments/languages were encapsulated in a library it would be a game changer for me.