Spark shows each flashcard right before you'd forget it. Make your own decks or pick one from the library, study in five-minute bursts, and keep your streak alive.
4.9 rating · loved by 120,000+ learners
Students from 400+ schools and universities study with Spark
From the first card to exam day, Spark plans what to review, mixes up how you practice and rewards you for showing up.
Rate each card from Again to Easy. Spark's scheduler spaces the next review so hard cards come back sooner and easy ones get out of your way.
What is the powerhouse of the cell?
The mitochondria — it produces ATP through cellular respiration.
An AI assistant that gives you a simpler explanation, a memory trick or a worked example — right from the card you're studying. Arriving in a future update.
Coming to Premium: paste notes, upload a PDF or snap a photo of the textbook. Spark writes the cards; you approve them.
Mix classic flips with matching games and multiple-choice quizzes so practice never feels repetitive.
Every session earns Sparks you can spend on premium decks and streak freezes. Miss a day? A streak freeze has your back.
No setup, no spreadsheets. Open the app and you're studying in under a minute.
Write your own cards in a few taps or grab one of thousands of community decks.
Five focused minutes a day. Spark decides which cards you see and when.
Watch your recall rate climb, keep your streak and unlock rewards along the way.
We're building an assistant that reads the card you're on and the deck around it, so its answers fit what you're actually learning — not a generic web search.
Soft paper tones, a light and a dark theme, and zero clutter between you and the next card.
"I used to cram the night before. With Spark I did ten minutes on the bus every day and walked into my anatomy final calm."
"Five minutes on the metro, every single day. The streak keeps me honest and the scheduler does the rest. My Japanese vocab went from 300 to 1,200 words."
"My kids pick a deck from the library after school. Homework time is genuinely fun now — they fight over the streak."
Every learner gets unlimited decks and spaced repetition for free. Premium is on its way, and schools can talk to us today.
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