Iknow

five minutes. five questions. one daily habit that actually makes you smarter. 40+ topics, adaptive difficulty, friend leaderboards. first week free—no card required.

that random fact about octopuses having three hearts? you'll still remember it three months from now. the difference between mitosis and meiosis? locked in. you're not just passing time anymore—you're building a knowledge base that compounds.

iknow tracks every question you get wrong and resurfaces it at the exact moment your brain's about to forget—days or weeks later. it's the same technique med students use to memorize thousands of terms. except you're doing it in five-minute bursts between meetings.

your brain forgets 70% of new info in 24 hours. unless you trick it into remembering. here's how iknow's spaced repetition actually works (and why you'll still remember that weird octopus fact months from now)