Hobby Market is a prediction-market game. Every question on the board is a real market on Polymarket — elections, sports, crypto, pop culture — with its live odds mirrored here. You bet with play coins (¢), your bets settle on the real-world outcome, and your winnings buy packs of real football player cards to collect. Then you take your friends on in private competitions.
Each market has two outcomes priced in cents that add up to ~100 — the price is the crowd's probability. A Yes share at 30 ¢ pays 100 ¢ if Yes happens, so you risk 30 to win 70. You always trade against the house at Polymarket's live price plus a 1 ¢ spread, and you can sell back any time at the current bid.
Cards are real players from six leagues — 🇮🇱 Ligat Ha'Al, 🏴 Premier League, 🇪🇸 La Liga, 🇮🇹 Serie A, 🇩🇪 Bundesliga, 🇫🇷 Ligue 1 — built from Wikipedia squad lists. Every card has a FIFA-style 1–99 rating and six stats (PAC · SHO · PAS · DRI · DEF · PHY) shaped by the player's position.
The Arena is where your cards play. Every game is priced from the ratings like a bet — you see the probability and the odds before you stake — and decided instantly by a deterministic engine on the server, so nobody can replay a result. Empty slots are filled by academy trainees rated 40, so a first free pack is enough to start.
A competition is a contained contest with friends. The host sets a time window, the starting pot every member gets (kept apart from your main wallet), and the rules: which markets (categories, then Polymarket tags to narrow it — Sports → Soccer → Champions League; in-play only; ending within a few hours), how to bet (underdogs cap or favourites floor, min/max stake, max bets per player, no selling) and a blind mode that hides everyone's bets until the end. One-click game modes fill these in. Members join with an invite code, up to 50 per competition.
Everything the app shows is available as JSON, Polymarket-style: markets with live prices, history, leaderboards, profiles, the card catalog, pack odds — and, with a personal API key, trading: buy and sell shares by token id like on Polymarket's CLOB (fill-or-kill against the house), your positions, fills, packs and competitions. Mint keys on the API page.
Profiles & leaderboards