- Prediction‑market apps are now mainstream — Kalshi and Polymarket lead, while newcomers like OG Predictive, Novig, ProphetX, DraftKings Predictions and Plus500 focus more on sports, different states, or alternate interfaces.
- Contracts trade like probabilities (e.g., 62¢ ≈ 62% chance) and settle at $1 if you’re right; you can often sell early, but you can also lose your entire stake and may owe taxes.
- State access and age limits vary (some apps require 21); many platforms offer welcome promos, so check eligibility in the app before depositing.
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