Spaced repetition has proven its worth to me. When learning English, spaced repetition helped me learn faster. Additionally, when I started learning chess, Chessable's spaced repetition helped me improve my tactics, and it certainly is helpful for training openings.
There is a ton of open-source software that leverages spaced repetition for learning vocabularies and more. However, there's no go-to open-source spaced repetition software or web app. Instead of spending more time searching for such software, I took it upon myself to create one as a hobby.
I have been using this website on my local network (my mini-server) at home for almost a year and have decided that it's at a stage where it could benefit others who are interested in this learning method.
Enjoy it (Long live open source) 🍻