Estimation & Decision Game PRO

Most people who say they are "90 percent sure" are right only about half the time. GAUGE measures and trains the one skill almost nobody tracks: knowing what you don't know.

WHY YOU'LL LIKE IT (all free)
- Finally see what you don't know - GAUGE scores how well your confidence matches reality, then trains it.
- Find out if you are better calibrated than a frontier AI, right inside the free Lab.
- Private by design: on-device only, no account, no sign-up, no tracking, no ads.
- No timer, ever - GAUGE measures judgment, not speed.

FOUR WAYS TO ANSWER
- RANGE: give a 90 percent confidence interval.
- CLAIM: judge a statement true or false.
- OVER or UNDER: call it above or below.
- FERMI: estimate the order of magnitude on a log scale.

A TRANSPARENT GAUGE SCORE
- A published 0-100 score built on proper Brier scoring.
- Coverage, sharpness, and a clear letter grade.
- A "how it's scored" screen so nothing is a black box.

THE LAB (free)
- A calibration curve: your stated confidence versus your real accuracy versus the perfect diagonal.
- Overconfident points highlighted so you see exactly where you slip.
- Coverage versus your target, plus a by-domain breakdown.
- BASELINES that compare you to the roughly 52 percent human average and to a frontier AI.

DAILY TEN AND STREAKS
- The same ten questions worldwide, once a day.
- Build streaks and share a spoiler-free result grid.
- An activity heat map, active days, longest streak, and best grade.

FREE AI TOUCHES
- A short AI micro-insight after each set.
- On-demand "why" context on any answer.
- Every reveal shows the truth with its source - a micro-lesson each time.

PRIVACY
- On-device only: no account, no login, no tracking, no ads, no ad identifier.
- For the AI touches, only anonymized aggregate statistics are sent to a third-party AI provider - never your identity, device identifiers, or raw per-answer logs.
- Export your record as CSV or delete everything anytime.

BUILT FOR IPHONE AND IPAD
- Universal app with a warm-paper light theme and a dark terminal theme.
- Clean monospace aesthetic.

For anyone who loves trivia and quizzes but wants something smarter, and for forecasters and fans of decision-making, probability, rationality, cognitive bias, mental models, and self-improvement.

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