Estimation & Decision Game PRO
Calibration Trainer Gauge
$1.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.
How often are you right when you feel 90 percent sure? Most land near half. GAUGE grades your judgment 0 to 100 and trains it, no timer. Better calibrated than an AI?
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.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved Performance
The developer, Aneesh Pradeep, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Aneesh Pradeep
- Size
- 4.5 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 10 Deep Dives $19.99
- 3 Deep Dives $6.99
- 1 Deep Dive $2.99
- Copyright
- © Aneesh Pradeep