Five real-world questions a day. Instead of guessing a number, you drag two brackets to trap it in a range — a narrow range that hits scores big, a miss scores zero, so honest calibration is the winning strategy. Streaks, an emoji share grid, challenge-a-friend links, and stats that show whether your confidence matches reality. Free, no accounts, no tracking, works offline as an installable app. A one-time Pro unlock ($6.99 launch price) adds unlimited practice and the full archive.
