[dtdynasty]

If you're looking for something like this for Japanese, Kou, has been doing great work on https://jpdb.io/ which contains many of the concepts OP's app is trying to accomplish specifically for Japanese.

In particular it has the SRS, parallel text for words, assisted study and % of content you already know.

[solarmist]

Yeah, I'm familiar with this and it's a great resource.

The key difference is that it is still flashcard based. And you have to choose between a word or sentence cards that conflate the context with the word being studied.

By actually parsing the text, when you are studying the word "eat": "Where are we going to eat?", "I wanna eat a burrito the size of my head!", "No way. You just ate that ice cream cone."

* You separate the target of studying from the context/presentation. You can create an exercise from any of the many sentences using eat, ate, eating, etc. And change examples for every study repetition.

* You can focus on individual conjugations or overall knowledge of the word.

* You have an objective right/wrong signal instead of a subjective 0-4 scale.

* You can attach definitions to not only the target word but all of the words in the sentence on demand.

* You can track learning across all 25 of the words from my examples simultaneously. And those sentences can be used to generate exercises for any one of those 25 words.

[kouteiheika]

Hi. I'm the dev behind jpdb.

> The key difference is that it is still flashcard based.

Oh I have a lot more ambitious plans than just flashcards. (: It's just that you have to start somewhere, and flashcards are basically the current gold standard. No need to immediately throw the baby out with the bathwater, especially since a huge chunks of code can be reused for other forms of learning.

> You have an objective right/wrong signal instead of a subjective 0-4 scale.

I also have this as an option (pass/fail mode). The con of this is that it lowers the quality of SRS predictions, so you end up having to do more reviews. But depending on how much time you gain by not having to think about how to grade it can become a net improvement, so it's a tradeoff. I haven't yet had the time to precisely measure it yet.

> And change examples for every study repetition.

For what's worth I have that too. (:

> You can focus on individual conjugations or overall knowledge of the word.

In Japanese I feel this would be counterproductive, since essentially all conjugations are regular. This means that once you're not a beginner you just want to learn a word without wasting time on conjugations. But for a beginner, sure. And if you want to make any money targetting beginners is the way to go.

[solarmist]

Sounds great. If you're up for it, I'd love to chat with you about jpdb. It sounds like, and if nothing else, we'd have a great conversation about the challenges and ideas behind making a language learning tool.