# Hinge Protractor — Read your physical hinge angle

> Read your physical hinge angle (iPhone/iPad app by Maksim Tatarchenkov.)

- Source: https://appshunter.io/ios/app/hinge-protractor/id6812223231 (this page in markdown: same URL + `.md`)
- Developer: [Maksim Tatarchenkov](https://appshunter.io/developer/6810974884)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 6 MB
- Languages: American English, Russian, Chinese (Simplified, China)
- Released: 2026-10-18
- Data updated: 2026-10-21

## What is Hinge Protractor?

Hinge Protractor for iPhone Duo:

Forgot your protractor to school? Want a measure an angle at construction? Tracing a pattern and need a glowing guide line under the paper? Use the app on Duo!

On iPhone Duo, it reads the hinge sensor and shows the exact angle between the two screens as you fold. 
On any other iPhone, the whole screen becomes a ruler at true physical size.

FEATURES:

- Live angle: Fold or tilt and watch the number follow in real time.
- Resizable measurements: Pinch, twist and drag the reading anywhere on screen.
- Honest precision: one-time calibration: open and close the hinge slowly, once.
- Real-size ruler: Rulers along the screen edges show true physical size in centimetres or inches. Check them against any bank card for perfect accuracy.
- Relative measurments: Drag two lines across the screen and read the exact position off both rulers.
- Saved measurements: Double-tap to save an angle, a ruler position or both. Add a note, drag to reorder, and undo with one tap.
- Configuration: Degrees or radians, centimeters or inches, light or dark theme, in English, Russian or Chinese.

## Is Hinge Protractor safe?

Not enough ratings yet to assess Hinge Protractor.

## Is Hinge Protractor legit?

Hinge Protractor has limited verification signals. The AppsHunter Legitimacy Score for Hinge Protractor is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 2 — 2026-10-19

- Support iPhone Duo angle sensor
- Add pixel ruler

### 1.0 — 2026-10-04

No release notes.

## More apps by Maksim Tatarchenkov

- [kami: hinge driven origami](https://appshunter.io/ios/app/kami-hinge-driven-origami/id6810977836)

All apps by Maksim Tatarchenkov: https://appshunter.io/developer/6810974884

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-21.*