Learn

Pick a deck, finish the course, then ace the timed exam.

🚀

Bomb Pops 101

Rocket-style ice pops: the accidental invention, the striped flavors, and frozen-treat science.

18 cards · 4 lessons

🪙

Crypto Basics

Wallets, keys, chains and the red flags every player should know.

16 cards · 3 lessons

🌍

World Capitals

Twenty capitals across six continents. Some are trickier than you think.

20 cards · 4 lessons

🐉

HSK 1 Basics

Eighteen starter Chinese characters with pinyin and meaning.

18 cards · 3 lessons

Deck file format

{
  "title": "My Deck",
  "emoji": "🧠",
  "cards": [
    { "front": "Question or term", "back": "Answer", "note": "optional hint" }
  ]
}

At least 4 cards. Free accounts can keep 3 custom decks.