Ballpark

🚀 Launching on Product Hunt today: https://www.producthunt.com/products/ballpark-the-daily-estimation-game

Five real-world questions a day. How deep can an emperor penguin dive? What year was ether first used as anesthesia?

You don't answer with a number — you drag two brackets to set a RANGE. If the truth lands inside, you score; the narrower your range, the bigger the points. Miss entirely and you get nothing. It's a game about knowing how much you actually know.

- Same five questions for everyone, every day

- Streaks, emoji share grids, challenge-a-friend links

- Stats that track your calibration — most people discover they're overconfident within a week

- Free, no signup, works offline, installs as an app

Every answer is fact-checked and carries a source note.