Academics
PriorForge
Every game starts at 5.5 (ages 15–18): adjust the block of dummy votes, add real ratings, and watch a Bayesian average pull a small crowd toward the prior — the exact shrinkage formula behind a board-game leaderboard. Only volume overcomes the prior. Deterministic, on-device.
▶ Play it nowBuilt for sittings of about 25 minutes on the screen. That is our design budget, not a measurement.
#5b6cc4 Characters who teach
Meet the cast
PriorForge's cast (ages 15–18, realistic statistician personas — no mascots) each embody one idea behind the Prior Rule; mentor Sol asks what a rating with only three votes really tells you.
Priya
the prior — every game starts at 5.5 before any real vote
Bayard
the shrinkage average — blends the prior with the evidence (the Bayesian mean)
Vera
the volume rule — it is VOLUME, not a loud few, that overcomes the prior
Dunna
the dummy-count — counts the prior block and how many real votes it takes to move it
Sol
asks what a three-vote rating really tells you
What's inside
Learning goal
Every game starts at 5.5 (ages 15–18): adjust the block of dummy votes, add real ratings, and watch a Bayesian average pull a small crowd toward the prior — the exact shrinkage formula behind a board-game leaderboard. Only volume overcomes the prior. Deterministic, on-device.
Mentored by Sol — no data leaves the device.
How PriorForge handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages
