Duometry

Duometry is an iPhone game about guessing angles. On iPhone Duo, fold the phone to match a target angle. On other iPhones, adjust your guess with an on-screen dial. Your exact angle stays hidden until you’ve made your guess.

Play alone or take turns on one phone with two to eight players. Everyone guesses the same target before the results are revealed together. Choose five or ten rounds.

Daily gives you three angles to remember and recreate, with a new challenge each day. Complete a challenge to add it to your weekly progress.

Free Measure shows the phone’s fold angle on Duo. On other iPhones, Explore Angles lets you adjust an angle with the dial and see its value. Duometry works offline and needs no account.

Available on the App Store from Monday, October 19, 2026 for US$2.99.

App Store: https://apps.apple.com/app/id6814650592
TestFlight: https://testflight.apple.com/join/PUm89hu7
Press contact: arno.appenzeller@gmail.com
