Building an AI-Powered Driving Theory Exam Platform with the FSRS Algorithm

When we set out to build KETis — an AI-powered platform that helps Lithuanians prepare for their driving theory exam (KET) — we faced a deceptively simple question: how do you teach 2,500+ exam questions across 17 license categories without burning students out? The answer turned out to be an algorithm called FSRS (Free Spaced Repetition Scheduler). In this post, I'll walk through why we chose it over the classic SM-2 approach, what surprised us during implementation, and what 82% pass rates tau