(Author) Last year I wrote a web app for practising Spanish verb conjugations called Verb Master. It got some interest on Hacker News (see here:
https://news.ycombinator.com/item?id=14326166). I recently re-wrote it in TypeScript and improved load times and mobile performance.
It now saves your stats in local storage and uses them to suggest which verb-tense combinations to study. I also added a better game review with high scores.
Github repo: https://github.com/andycloke/verbly
