# Flying Ruler: 3D Tape Measure — Distance Meter, Rangefinder

> Device-based tool for measuring distance, angles, and dimensions. (iPhone/iPad app by ALEXEY BRILEV.)

- Source: https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844 (this page in markdown: same URL + `.md`)
- Developer: [ALEXEY BRILEV](https://appshunter.io/developer/667579847)
- Category: Utilities, Education
- Price: $1.99
- Rating: 4.10/5 from 187 App Store ratings · 461 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 78 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Russian, Chinese (Simplified, China), European Spanish
- Released: 2013-08-23
- Data updated: 2026-08-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844/reviews.md

## What is Flying Ruler?

The Flying Ruler app allows you to measure in the most original way: by just moving your device from one point to another.

Flying Ruler is a ruler, tape measure, rangefinder, protractor and a 3D angle finder. It is five devices in one app, providing you with the quickest way to measure a distance or an angle.

The secret of the program is that it is based on the principles of the inertial navigational system (INS): the position of the device is determined with the help of the accelerometer and the gyroscope.

Measurements take place extremely quickly and at the same time they are quite accurate. We are constantly improving our computational algorithm for more than 11 years!

To try this technology for free you can install the app "Digital Angle Finder: 3D Meter". This free app measures the angle as you move the device.

AWARDS:

Editor's Choice — 148Apps
www.148apps.com/reviews/flying-ruler-review

PRESS ABOUT US:

"I was impressed with Flying Ruler’s accuracy. It works quickly and effectively", "It’s the perfect addition to anyone’s app collection" — 148apps 4.5 / 5 (MUST HAVE)

"This thing is awesome" — brettterpstra.com

"I literally said “wow!” when I first used this app and I think it’s a truly impressive marvel of mobile technology", "The Flying Ruler Rules" — AppPicker (Cons: there is nothing negative to say about this app)

*** Measure distance with good precision, no matter the lighting or conditions ***

The app has different modes so you can choose which mode is better and easier to use on each occasion. You can measure with the body of the device in one mode or with a virtual tape measure in another. You can not only measure an object but also the distance between two walls (rangefinder mode). You use the same methods to measure angles as the app allows you to measure angles both on a surface area (protractor mode) and between surfaces through space (3D angle finder mode).

You can choose either inches or centimeters. The maximum distance is only limited by the value of the indicator which consists of 999 ft for the imperial system and 99 m for the metric system.

When measuring, you can avoid obstacles and therefore you can measure anything.

Flying Ruler is suitable for measuring not only large, but also very small distances with the accuracy of a standard ruler.

The app also allows you to save a measurement by taking a photograph of the measurement and mark the place that was measured.

Don’t forget to show your friends and colleagues how the app works – believe us, they will be impressed.

ACCURACY OF MEASUREMENT:

We took 100 consecutive measurements and got these results:

On iPhone 13:

• Mean squared error - 0.14%
• Maximum inaccuracy - 0.4%

On iPhone 7:

• Mean squared error - 0.15%
• Maximum inaccuracy - 0.4%

On iPhone 6s:

• Mean squared error - 0.28%
• Maximum inaccuracy - 1.1%

The accuracy of measurements depends on the device, however the error rarely exceeds 1.5%. You can always increase accuracy by making a series of measurements. If you make a series of measurements, the degree of error is usually 0.3% or less.

Angles can be measured with the app to an accuracy of one degree so the app can easily take the place of a protractor or a angle finder.

WEBSITE:

www.flying-ruler.com

## Key features

- Measure distance by moving device
- Ruler, tape measure, rangefinder
- Protractor and 3D angle finder
- Inertial navigational system technology
- Adjustable units (inches/cm)
- Save measurements with photos
- Avoid obstacles during measurement

## What do users think of Flying Ruler?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🚀 Convenient for quick measurements
- 💡 Clever use of phone sensors
- ⭐ Accurate for most use cases
- 🎨 Visually appealing interface

**Cons**

- 🐛 Inconsistent measurement accuracy
- 📏 Not as precise as a physical ruler
- ⚠️ Requires multiple measurements for reliable results
- 🤔 Confusing calibration process

**Commonly reported bugs**

- Measurements vary wildly between attempts
- Calibration process fails to complete
- App crashes when used with certain phone cases

**Most requested features**

- Add imperial unit support
- Integrate with smart home devices
- Provide more advanced measurement tools
- Improve accuracy for smaller distances

## Recent user reviews (10 of 461)

All indexed reviews: https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844/reviews.md

### 5/5 — Wow, spot on

*2026-02-06, version 6.3.2*

Took a few tries to figure out calibration etc. Once I did that it was surprisingly spot on the mark. Quite impressive!

### 5/5 — Excelente aplicativo

*2025-05-26*

Substitui perfeitamente qualquer (não considerando medidores a laser) régua ou trena.

**Developer response:** Agradecemos muito a sua avaliação! Estamos sempre trabalhando para aprimorar nosso algoritmo de cálculo e, quem sabe, em breve a precisão se tornará comparável à de medidores a laser. Já notamos que a precisão se aproxima desse nível ao usar uma série de medições.

### 1/5 — Useless

*2025-01-25, version 6.1.1*

Very disappointed

### 5/5 — Отлично

*2024-03-22*

Приложение работает. Точность хорошая (совпадает с точностью буквально до нескольких миллиметров). Довольно точный инструмент, когда нет рулетки. И сделано красиво

### 4/5 — とても良い

*2023-03-19*

他人に自慢できるアプリです
購入して、良かった

### 5/5 — iPhone 7

*2021-10-04*

На iPhone 7 на небольших расстояниях (около метра) погрешность обычно всего 1-3 мм! До этого была шестерка -  там была точность похуже. На больших расстояниях очень хорошо работает усреднение. На удивление, довольно точный инструмент.

### 4/5 — Линейка на экране!

*2021-02-02*

Линейка на экране отображается не верно!!!
 12 Pro Max. 
Но можно установить масштаб вручную.

**Developer response:** До выхода обновления Вы можете выставить правильный размер линейки в "Настройках": "Параметры устройства"/"Масштаб шкалы". Пункт "Параметры устройства" как раз предназначен для выставления параметров новых устройств. Также необходимо выставить и другие параметры. Это нужно сделать только один раз. Если пункт "Параметры устройства" не отображается (такое происходит крайне редко) - переустановите приложение. Если пункт "Параметры устройства" присутствуют, но в нем нет пункта  "Масштаб шкалы" - значит масштаб был определен автоматически.

### 2/5 — IPhone 12 не настраивается габариты линейки

*2021-02-01*

Настройки масштаба нет!!
Там меню выглядет так:

Единицы измерения 

Толщина чехла

Универсальный доступ

Стиль
Звуковая схема.

Это все что есть.. Может что-то глючит?

**Developer response:** До выхода обновления Вы можете выставить правильный размер линейки в "Настройках": "Параметры устройства"/"Масштаб шкалы". Пункт "Параметры устройства" как раз предназначен для выставления параметров новых устройств. Также необходимо выставить и другие параметры. Это нужно сделать только один раз. Если пункт "Параметры устройства" не отображается (такое происходит крайне редко) - переустановите приложение. Если пункт "Параметры устройства" присутствуют, но в нем нет пункта  "Масштаб шкалы" - значит масштаб был определен автоматически. P.S. Лучше всего решать все возникшие проблемы через поддержку - это быстрее, чем переписка в отзывах :)

### 1/5 — 全くダメ

*2020-11-23*

そもそも1cmの長さが違う！

### 5/5 — I like it

*2020-10-17, version 4.4*

It is very well made

## Frequently asked questions about Flying Ruler

### What does the Flying Ruler app do?

The Flying Ruler app allows you to measure distances and angles by simply moving your device. It acts as a virtual ruler, tape measure, rangefinder, protractor, and 3D angle finder, utilizing your device's accelerometer and gyroscope.

### How accurate are the measurements?

The app is designed for high accuracy, with reported mean squared errors as low as 0.14% on newer devices. While accuracy can vary slightly by device, the error rarely exceeds 1.5%, and you can increase accuracy by making more precise movements.

### What are the measurement capabilities?

You can measure linear distances, the distance between two points (rangefinder mode), angles on a surface (protractor mode), and angles between surfaces in 3D space. It supports both imperial (up to 999 ft) and metric (up to 99 m) units.

### Is this app free to use?

The Flying Ruler app is a paid application. However, a free app called 'Digital Angle Finder: 3D Meter' is available to try out the angle measurement technology.

### What devices is this app compatible with?

The app is designed for mobile devices and uses their built-in sensors like the accelerometer and gyroscope for measurements. Accuracy has been tested and reported on various iPhone models, indicating compatibility with modern smartphones.

## Version history (last 5 releases)

### 6.3.3 — 2026-03-06

- support for all new devices, including iPhone 17e, iPad Air 11-inch (M4), iPad Air 13-inch (M4)
- other minor alterations and improvements

### 6.3.2 — 2026-01-09

- support for iPad Pro M5
- minor changes and improvements

### 6.3.1 — 2025-11-25

- improved user interface
- other minor changes and improvements

### 6.3 — 2025-10-07

- optimized for iOS 26
- support for all new devices, including iPhone 17 (Pro / Pro Max / Air)
- improved user interface
- other minor alterations and improvements

### 6.2.2 — 2025-07-25

- minor changes and improvements

## Apps similar to Flying Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Measure Tools: AR Room Planner](https://appshunter.io/ios/app/measure-tools-ar-room-planner/id1299651802) | 4.5 (143) | Free | Utilities |
| [Tape Measure™](https://appshunter.io/ios/app/tape-measure/id1271546805) | 4.4 (88,159) | Free | Utilities |
| [Measure](https://appshunter.io/ios/app/measure/id1383426740) | 3.1 (1,569) | Free | Utilities |
| [Measurement app for iPhone](https://appshunter.io/ios/app/measurement-app-for-iphone/id1586541589) | 4.8 (108) | Free | Utilities |
| [Measuring Tape+ Measure AR app](https://appshunter.io/ios/app/measuring-tape-plus-measure-ar-app/id6444381350) | 4.5 (2,022) | Free | Utilities |

## More apps by ALEXEY BRILEV

- [Digital Angle Finder: 3D Meter](https://appshunter.io/ios/app/digital-angle-finder-3d-meter/id1081939665)

All apps by ALEXEY BRILEV: https://appshunter.io/developer/667579847

## Related topics

[flying ruler](https://appshunter.io/ios/topics/flying-ruler) · [cinta metrica metro](https://appshunter.io/ios/topics/cinta-metrica-metro) · [pinion angle finder](https://appshunter.io/ios/topics/pinion-angle-finder)

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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 2026-08-28.*