EstudIA - A high school student built the study app he wished existed

I'm a bachillerato student in Spain (11 subjects). I spent months reading about how memory works — Cal Newport, spaced repetition, Feynman technique, active recall. So I built my own. estudia.work is a free web app that combines spaced repetition, Pomodoro timer, Feynman technique with AI gap detection, and an exam generator — all in one place. I've been using it for 2 months to prepare my own exams. This trimester: 10 in Technology, 9.5 in Physics, 10 in PE.