How it works

🧠 Spaced repetition & “due”

Every card you study gets its own schedule. Answer a card correctly and the app waits longer before showing it again — a few seconds at first, then minutes, then hours, days, and weeks as it sinks in. Miss one and it comes back soon so you can shore it up.

When a card's timer runs out, it's due — that's the app's way of saying “you're about to forget this, let's review it now.” Each session leads with your due cards and mixes in new material at a steady pace, so you're always studying the things that need it most. Studying several sets at once? They're blended together fairly, so no single subject hogs the session.

Run out of due cards? You can keep going anyway — extra practice never hurts, it just won't change the schedule much.

🌱 Learning new cards

The first time you meet a card, you can Learn it — see the answer up front to get acquainted — before it switches to recall, where you type or pick the answer from memory. Brand-new cards are introduced in small batches rather than all at once, so you're not overwhelmed, and recent misses resurface within the same session to lock them in.

📊 Levels & skipping ahead

Many sets are split into levels, ordered easiest to hardest (for example, the periodic table runs from the common first ten elements up to the obscure synthetics). You start at level 1, and the next level unlocks as you make progress — but you're never locked in.

If a level is too easy, hit Jump ahead to unlock the next one immediately. Go as fast as you like; there are no daily limits on how much you can learn.

🎲 Two kinds of sets

Most sets are fixed decks — a known list of cards (vocabulary, capitals, elements) that move through the spaced-repetition schedule above.

Others are endless generators 🔁 — they invent a fresh question every time instead of drawing from a fixed deck. The mental-math drills make up new problems (8 × 56), and the music drill draws random intervals and chords on the staff. Because the questions are generated, you can't just memorize a deck — you have to actually know it.

Generators use a mistake bank instead of the normal schedule: get a fresh question right and we don't track it (there are infinitely many), but miss one and that exact question is saved and resurfaces soon — coming back less and less often until you've nailed it. Purely computational sets like arithmetic skip the “Learn” step, since you work the answer out rather than recall it.

📚 Studying

Studying is your personal study library. Add any set to it (or just start training and it's added for you) so it's one tap away on the home screen and part of your blended sessions.

• Remove a set to declutter your library — your progress is kept, so re-adding it later picks up exactly where you left off.
• Reset a set (from its page) to wipe its progress and start fresh, as if you'd never studied it.

🔥 XP & streak

You earn XP for studying — a little reward for the effort you're putting in:

• +10 XP for recalling a card correctly — +15 if you nail it quickly.
• +25 XP bonus the moment a card becomes Mastered (stable for 3+ weeks).
• +3 XP for learning a new card (seeing the answer, or “I already know this”).
• A wrong answer earns no XP.

The in-a-row streak at the top counts consecutive correct recalls in a session (a wrong answer resets it; just learning a card leaves it untouched — you haven't recalled it from memory yet). Your day streak grows each day you study and resets if you skip a day, so a quick daily session is always worth it.

Ready?

That's the whole system — no setup, no account required, and your progress lives on your device until you choose to sync it. Browse the sets and start grinding.