I'm a high-school student and I built a free app to stop forgetting everything over the summer

Hey everyone,

The school year is almost over, and every summer I hit the same problem: by September I've forgotten most of what I learned. It happens with everything. I feel confident with math formulas while I'm using them, but after a few months away they look like I've never seen them. Same with languages — my English and German feel solid at the end of the year or after finishing a book, and a few weeks later my vocabulary and grammar have basically evaporated.

So I built a small app to fight that, called Revise: https://revise-o1t7.onrender.com/

The idea is simple: give yourself regular practice on the things you've actually studied, so they stick. You can practise math, history, languages, chemistry and biology — it generates exercises, reading texts (which you can translate word-by-word right in the app) and flashcards, all on a spaced-repetition schedule so things come back just as you're about to forget them.

It works with whatever AI you already use: you copy a generated prompt into ChatGPT, Claude or Gemini (the free versions are fine), and paste the reply back. No API key, no subscription. It's free, and you can install it to your phone from the menu.

I've been using it for a while and it's genuinely helped me remember things, not just learn them once. I'd love your feedback — what's confusing, what's missing, what you'd want next (there's a feedback button in your account settings).

Thanks for reading, and I hope it helps someone! 🙂