Learn something new, one card at a time.

Swipe through true or false cards on science, history, art, tech and more. KnowSoda learns what you know and picks what to show you next.

How it works Coming soon to Android & iPhone

Free to play. No account needed. Works without internet.

SodaThis one is about you, actually.

LearnPsychology / How Memory Works

In the 1880s, Hermann Ebbinghaus found that we forget new information fast, much of it within a day, unless we review it.

Key fact
Reviewing at the right moments flattens the forgetting curve.

161subjects

9,800+cards

420animated pictures

100%offline learning

How it works

Two minutes a day is enough.

No lessons to finish and no streak guilt. Open the app, answer a few cards, close it.

Each card is one short claim. Decide if it’s true, then see why in a sentence or two.

Every answer updates your mastery of each idea. Cards you’re close to getting come back; ones you know fade away.

Learn cards, “Did you know?” facts, a short illustrated story in every subject and hundreds of animated pixel pictures.

From the cards

AnimalsKarl von Frisch won a Nobel Prize in 1973 for decoding the bee dance.

Maps & NavigationMapmakers once added fake towns to catch copiers. One of them, Agloe, became real.

Light & SoundA singer can shatter a wine glass by matching its note.

EvolutionDarwin predicted a moth with a giant tongue from one orchid’s long nectar tube.

Food ScienceHoney resists spoiling because it has so little water.

World WarsAt Christmas 1914, soldiers on the Western Front stopped fighting on their own.

Meet Soda

Soda hatches when you start and grows with you. It cheers you on, comments on what you’re learning and naps when you take a break.