Duometry
Angle Guessing Game
Only for iPhone
$3.99 · Designed for iPhone. Not verified for macOS.
iPhone
How well can you judge an angle?
Duometry challenges you to match a target angle as closely as you can. Fold a compatible device or adjust the on-screen dial, lock in your guess, and discover how close you came.
Play solo over 5 or 10 rounds and aim for your best score.
Pass one device between 2–8 players for a friendly competition. Everyone’s guesses stay hidden until the shared reveal. Find out who came closest, compare scores, and keep playing.
Explore angles at your own pace with the dial. On hinge devices, Free Measure lets you read the device’s fold angle directly.
Come back for a daily challenge with three targets. Different daily modes put your angle intuition and visual memory to the test.
Play offline, with no account required.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- minor fixes
The developer, Arno Appenzeller, 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
- Arno Appenzeller
- Size
- 4 MB
- Category
- Casual
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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 and 3 more
- English, French, German, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 APPenzeller
