Official launch in October 2026
Maintenance in progress. We'll be back soon. If you have an account, you can keep learning and your progress syncs afterwards. New sign-ups open again after maintenance.
PurFact is free: no Pro needed. Want more? Try Pro free for 7 days at any time (cancel before it ends).
Currently open to testers only. Until launch, signing up requires an invite code: leave your email below and we'll let you know when it starts.
No cramming, just a few cards in between instead of mindless doomscrolling. And the app makes sure they stick.
Knowledge in small bites: in the browser, on your phone or as a Chrome extension in every new tab. Over 1,800 packs, from art to astronomy to football.
New questions start with four answer options. Once you get it right, PurFact asks again without help: only then does it count as learned.
Every card you know returns after a day, then after three, seven and fourteen days. Whatever you missed comes back sooner. You don't have to plan a thing.
Daily reviews, a daily goal and a streak keep you on track: all adjustable. One joker a week saves the flame when life gets in the way.
26 categories, from antiquity to current events (with image packs to identify and over 300 sounds): bird calls, national anthems, classical pieces. Plus learning paths that guide you through a topic step by step, and a timeline for everything with a date.
Try it: pick a category: five real cards from the app are waiting for you.
Just a demo: nothing is saved. Reload and you start from scratch.
Based on SM-2: what you know comes back rarely. What wobbles comes back tomorrow.
Image packs to identify and over 300 sounds: bird calls, national anthems, classical pieces.
Guided routes through a topic instead of clicking through a thousand packs.
Historical facts on a timeline: so you can see what happened when, and at the same time.
Mark cards with a star and practise them later.
With an account your progress travels with you: browser, phone, the same everywhere.
German, English, Spanish and French: packs in the language you choose.
The packs you learn turn into games. Your learning progress counts as usual.
Also included:
13 games to play on your own: geo, flags, sorting, estimation, elements, piano, Morse and more, with best times and medals.
Play friends at the same time, question by question in real time, with lobby and chat.
You play your round whenever you like, the others play theirs. Three days to finish, also in groups.
Levels, badges and leaderboards with friends: from daily goals to the Pathfinder badge for finished learning paths.
New Beta
A card game where knowledge counts: draw, play, attack and block until your opponent's knowledge points hit zero.
One account, the same progress: in the browser, as an extension or soon as an app.
Right here on purfact.app, nothing to install: on your computer just like on your phone.
For Chrome, Firefox, Edge, Safari and Opera: every new tab shows you a question instead of a blank page: learning on the side.
For iPhone and Android: the apps follow after launch.
PurFact is a learning app for general knowledge. It quizzes you on a few cards every day and repeats them using spaced repetition: right when you would otherwise forget them.
No. Learning, games and duels are free. Pro removes the daily limit and unlocks specialist knowledge, all learning paths and your own packs; you can try Pro free for 7 days and cancel before it ends.
Every card you know comes back after 1, 3, 7 and 14 days, then at ever longer intervals. Whatever you missed comes back sooner. It's based on the proven SM-2 method.
In the browser at purfact.app, on your phone too: where you can add PurFact to your home screen like an app. The Chrome extension shows you a question in every new tab; Firefox, Edge, Safari and Opera follow soon, as do apps for iPhone and Android. With an account, your progress stays the same everywhere.
Yes: live against each other, question by question, or as a remote duel where everyone plays their round whenever they like. Plus leaderboards, a friends feed and 13 games to practise on your own.
In German, English, Spanish and French: the packs come in whichever language you choose. More languages are on the way.
Only what's needed for your account and progress is stored. PurFact shows no banner ads and uses no tracking services. Everything else is in the privacy policy.
Ready for your first question?
Sign in or create an account.
Maintenance. Signing in works; new sign-ups open again after maintenance.
Currently for testers only. Until launch in October 2026, signing up requires an invite code.
By signing in you accept the community rules. Offensive, abusive or illegal content is not allowed and leads to a ban.
