Fold Protractor: Angle Finder
Spirit Level & Measuring Tool
About
This app transforms your device into a versatile measuring tool. It can determine hinge angles on foldable phones, function as a spirit level, and display precise rulers along its edges. Readings and ruler marks are approximate, and it's recommended to verify with a physical tool for exact measurements.
What's New in Fold Protractor
1.0
October 15, 2026
Developer apps
FAQ
What is Fold Protractor used for?
Fold Protractor turns your iPhone into a bevel gauge to measure hinge angles on foldable phones. It also functions as a spirit level and includes rulers along the device edges for measuring length.
Is Fold Protractor free to use?
No, Fold Protractor is a paid app. It costs $2.99 and offers a one-time purchase with no ads, subscriptions, or in-app purchases.
Does Fold Protractor have ads?
No, Fold Protractor is ad-free. The developer explicitly states 'No ads' and 'Pay once' for the application.
What devices does Fold Protractor support?
Fold Protractor is built for iPhone Duo but works on every iPhone. It is currently supported on iPhone devices.
How accurate are the measurements in Fold Protractor?
The app states that readings and ruler marks are approximate due to variations in phones and cases. For work requiring exact precision, it's recommended to check against a real tool.
Can I measure angles on non-foldable iPhones?
Yes, on every other iPhone, it works as a level. You can stand the phone on an edge to read its rotation or lay it flat to see surface tilt.
How often is Fold Protractor updated?
Fold Protractor was last updated on October 15, 2026, with version 1.0. This indicates it is a relatively new application.
What is the age rating for Fold Protractor?
Fold Protractor has an age rating of 4+. This means it is suitable for children aged 4 and above.