This is awesome.
Tested for Japanese. No problems so far, except sometimes repeating the desired number of times didn't work (mobile). Seems to work now.. But looping infinitely produces only three repetitions.
Really good UI with little friction: easily hone in on sentences, easily move on or jump ahead, see vocabulary, create Anki deck. Took a while to discover loop settings, but it's a good choice.
Only now discovered the "custom span loop mode". Great! I was about to ask for it!
AI mode is unobtrusive and helpful.
At last, found something that could need a touch up.. The starter deck from the example story is a bit nonsensical. It features words like URL and site from the Librivox intro. お is "translated" as "honorific" which is kind of true, but it's only a marker. A beginner might not know this. たち shows as answer "plural marker", there it worked. Integrating a flashcard app is no small feat. Impressive. I wonder what algorithm was used. Does it scale?
That's all. Thumbs up!
Thanks so much for testing Japanese! I'll review the starter deck and what goes into it. At the moment it's a bit random, and the nonsensical LibriVox intro spills in. I'll also try to filter out the function words. I have no way to judge that myself, my Japanese is zero.
Glad the mobile interface works. There's an iPhone app too, basically the web app but with native audio support. It can play in the background. Though it's not ready for release yet.
The built-in flashcards use FSRS-5, and I believe it's O(1) so it should scale but I haven't actually done any performance testing yet, to be honest.
The infinite loop is a bug, I'll dig into that too. And I'm not sure if you noticed, but I also put up an FSI Japanese course here: https://lingochunk.com/c/fsi-japanese. Again, I can't judge the quality myself, so I'd really welcome any feedback.
And thank you for the kind review!