# iSetSquare — Geometry Drawing Triangle

> Gyroscope-based goniometer for measuring angles and rotations. (iPhone/iPad app by Peter Breitling.)

- Source: https://appshunter.io/ios/app/isetsquare/id382820922 (this page in markdown: same URL + `.md`)
- Developer: [Peter Breitling](https://appshunter.io/developer/286215120)
- Category: Utilities, Education
- Price: $1.99
- Rating: 3.20/5 from 6 App Store ratings · 43 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 13 MB
- Languages: American English, German (Germany)
- Released: 2010-07-21
- Data updated: 2026-09-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/isetsquare/id382820922/reviews.md

## What is iSetSquare?

Goniometer tool using the gyroscope sensor.

Features:

- Measure relative angles and rotation counter
- 5 Unit modes, with a quick switch
- Background or foreground display rotation
- Fine calibration of the gyrometer
- Motion sensitive or manual lock mode
- Scrollable ruler (inch or cm)

- Check out all our products on www.plaincode.com

## Key features

- Measure relative angles and rotation
- 5 Unit modes
- Background or foreground display rotation
- Gyrometer fine calibration
- Motion sensitive or manual lock mode
- Scrollable ruler (inch or cm)

## Recent user reviews (10 of 43)

All indexed reviews: https://appshunter.io/ios/app/isetsquare/id382820922/reviews.md

### 5/5 — Serrage de culasse

*2025-08-18, version 1.7*

Utilisé pour un serrage angulaire de culasse. Très pratique et simple. Hyper précis. Économique : 2€ pour une précision parfaite contre 120€ pour un outil électronique ou 20-30€ pour une chinoiserie sans précision. Donc parfait cette petite application, pas trouvé d’équivalent mis à part la boussole (mais beaucoup moins pratique)

### 5/5 — Validissima

*2022-08-22, version 1.7*

Una delle migliori app del genere.

### 5/5 — Erstklassig!!!

*2017-12-12, version 1.7*

Die Idee und die Grafik sind echt super! Die Genauigkeit ebenfalls. Dafür muss man die App jedoch auch wie vorgesehen benutzen, nämlich mit flach liegendem iPhone. Genau wie „Clinometer“ aus derselben Schmiede eine Augenweide und ein echt praktischer Helfer!
Unter anderem zählt die App komplette Umdrehungen.

### 3/5 — Ruler is not accurate on iphone6+

*2015-06-30, version 1.5*

Otherwise I have no complain.

### 5/5 — Footwear fitter

*2015-06-03, version 1.5*

A very versatile goniometer that works in both the horizontal and vertical planes. Easy to use by a lone practitioner on a disabled patient.

### 5/5 — Awsome

*2015-02-21, version 1.5*

Perfect! Just what I needed

### 5/5 — Love the app

*2014-11-26, version 1.5*

I would say this app would be especially interesting to those who love to see gyro sensor in action.

### 5/5 — Great tool

*2014-11-23, version 1.5*

The developer has done a marvelous job developing this great tool for students and engineers. They know graphics well as well as precision work.

### 5/5 — Geodreieck

*2014-11-01, version 1.5*

Top App!

### 5/5 — Great

*2014-10-23, version 1.4*

Phantastic app, now updated for iPhone 6.

## Frequently asked questions about iSetSquare

### What is iSetSquare used for?

iSetSquare is a goniometer tool that uses your device's gyroscope to measure relative angles and rotations. It also includes a scrollable ruler for linear measurements.

### How much does iSetSquare cost?

iSetSquare is a paid application, priced at $1.99. There are no in-app purchases or ads mentioned.

### What devices is iSetSquare compatible with?

iSetSquare is available for iPhone, iPad, and iPod touch devices. It has an age rating of 4+.

### How often is iSetSquare updated?

The latest version of iSetSquare is 1.7, which was last updated on December 11, 2017. This indicates infrequent updates.

### Can iSetSquare measure angles in different units?

Yes, iSetSquare offers 5 different unit modes for measuring angles, with a quick switch function available.

### Does iSetSquare have a calibration feature?

Yes, iSetSquare includes a fine calibration option for its gyrometer to ensure accurate measurements.

### What is the user sentiment for iSetSquare?

Based on the available data, iSetSquare has a rating of 3.2 stars from 6 ratings, suggesting mixed user sentiment.

### Does iSetSquare work in the background?

Yes, iSetSquare allows for background or foreground display rotation, giving you flexibility in how you use the tool.

## Version history (last 5 releases)

### 1.7 — 2017-12-11

This update from Apple will improve the functionality of this app. No new features are included.

iPhone X Support

### 1.6 — 2016-11-12

• Refreshed App Icon
• Adaptions to iOS 10

Thanks for your feedback!

### 1.5 — 2014-10-28

1.5

Optimizations and bugfixes - thanks for your positive reviews!

1.4

- iOS8 Adaptions
- Ruler now exact on iPhone 6 and iPhone 6 Plus

### 1.4 — 2014-10-20

- iOS8 Adaptions
- Ruler now exact on iPhone 6 and iPhone 6 Plus

### 1.3 — 2012-09-23

iPhone 5 support

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## More apps by Peter Breitling

- [Clinometer + bubble level](https://appshunter.io/ios/app/clinometer-plus-bubble-level/id286215117)
- [Contacts last entries & search](https://appshunter.io/ios/app/contacts-last-entries-and-search/id294325239)
- [Bubble level and Clinometer](https://appshunter.io/ios/app/bubble-level-and-clinometer/id304152770)
- [MagnetMeter](https://appshunter.io/ios/app/magnetmeter/id346516607)
- [AccelMeter](https://appshunter.io/ios/app/accelmeter/id346525189)

All apps by Peter Breitling: https://appshunter.io/developer/286215120

## Related topics

[peter breitling](https://appshunter.io/ios/topics/peter-breitling)

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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 2026-09-10.*