SSR tools and flashcards are amazing for knowledge retention. When I started learning new language, my google sheet with words I wanted memorize grew to hundreds pretty quickly. I wanted the simplest possible app that would let me to import and repeat words from my list anytime I have even a few minutes to spare. And being a developer, of course I decided to write one myself. It’s a bit different than anki and obviously has less features (it’s a pet project after all) but the concept is pretty similar: https://byheart.io/