# Ruler - tape measure length — Tape Ruler with AR technology

> Augmented reality tape measure for on-the-fly length and perimeter calculations. (iPhone/iPad app by Anna Koynova.)

- Source: https://appshunter.io/ios/app/ruler-tape-measure-length/id1082255420 (this page in markdown: same URL + `.md`)
- Developer: [Anna Koynova](https://appshunter.io/developer/1441894484)
- Category: Utilities, Productivity
- Price: $1.99
- Rating: 4.30/5 from 594 App Store ratings · 285 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.1 · 1 MB
- Languages: Russian, American English, European Spanish, Italian, German (Germany), French (France)
- Released: 2016-02-17
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ruler-tape-measure-length/id1082255420/reviews.md

## What is Ruler?

New AR technology make easy to measure lenght on the fly with Ruler.

  Single measure ruler - draw one line with length.
  Chain measure ruler - measure several lines one by one.
  Perimeter measure ruler - several lines with close perimeter form last point to first.

Colors - for separate different measures.

## Key features

- Augmented reality measurement
- Single line measurement
- Chain measurement for multiple segments
- Perimeter calculation
- Color-coded measures

## What do users think of Ruler?

Overall sentiment: neutral

**Pros**

- 👍 Convenient
- 🚀 Works like charm
- 👍 Useful app
- 👍 Precise and practical
- 👍 Excellent app
- 👍 Easy to use
- 👍 Great measuring tool

**Cons**

- 🐛 Colour button does not work
- 🐛 Photos do not work
- 🐛 App crashes when changing color
- 🐛 Measurements are inaccurate
- 🐛 App crashes
- 🐛 Can't see measurements
- 🐛 Not always accurate

**Commonly reported bugs**

- Crashes when changing color
- Photos come out black
- Measurements are inaccurate

**Most requested features**

- Allow setting units of measurement
- Improve edge detection for better accuracy
- Add option to view measurements in the center of the screen
- Improve compatibility with older devices
- Add option to disable review prompts

## Recent user reviews (10 of 285)

All indexed reviews: https://appshunter.io/ios/app/ruler-tape-measure-length/id1082255420/reviews.md

### 1/5 — Обман

*2026-03-30*

Делал замер стандартной лампочки. По замерам не смог ничего найти.. Сравнил линейку на экране с обычной линейкой. На десяти см разница в один сантиметр! Обалдеть!

### 2/5 — Не сохраняет изображения

*2025-07-05*

Измеряет хорошо, но ничего не сохраняет, только полностью черные картинки.

### 3/5 — Colour button

*2024-03-21, version 2.1*

Colour button does not work. When pressed to change colour the app closes. Also would be handy to be able to se the units of measurement so it opens to the same each time not default to inches.

### 3/5 — Eigentlich super, aber Fotos funktionieren nicht!

*2023-10-20*

Die App ist sehr gut, alle Maßeinheiten da, die man sich wünschen kann. Aber wenn man dann ein Foto über die App macht, ist es einfach nur schwarz!

### 1/5 — Very frustrating to use

*2023-09-13, version 2.1*

Every time I take a whole lot of measurements then screenshot from different angles and save to photos, all the photos are Black no picture or dimensions
Very disappointing

### 2/5 — Plus précis

*2022-06-08*

Avec mon iPhone X sous 15 les mesures sont fausse de plus de plus ou moins 10% ce qui fait 20% d'erreur possible. Je désinstalle

### 1/5 — App stürzt ab

*2022-03-04*

Eigentlich ein nettes Tool, aber die App stürzt jedes mal ab, wenn ich die Farbe der Linie ändern will. Das können andere kostenlose (!) Apps besser! Sein Geld also leider nicht wert.

**Developer response:** Bitte sagen Sie mir, welches Modell Ihr Gerät ist?
royalblue@gmail.com

### 1/5 — 精度が低すぎる

*2022-03-03*

ios基本アプリの方がいい

**Developer response:** わかった

### 1/5 — Déçu

*2021-12-28*

La fonction appareil photo ne fonctionne pas. Obligé de faire une capture écran pour sauvegarder. Je comprends mieux sa gratuité aujourd’hui.
Passez votre chemin 😢

**Developer response:** essayez d'abord d'autoriser l'application à enregistrer la photo.

### 4/5 — Excellent app, but…

*2021-11-03, version 2.1*

The app is very useful. One note, results are visible during measuring. then they seem to be tied to the middle of the line. when measuring long distances, hard to find the final number. it would be helpful to see the result as a value somewhere on the screen independent of the measuring configuration.

## Frequently asked questions about Ruler

### What does this ruler app do?

This app uses augmented reality (AR) technology to allow you to measure lengths and distances in the real world using your device's camera. You can measure single lines, multiple connected lines, and calculate the perimeter of enclosed areas.

### How does the measurement work?

The app overlays virtual measurement lines onto your camera's view. You simply tap on the screen to set points, and the app calculates the distance between them. Different modes allow for single measurements, sequential measurements, and perimeter calculations.

### Is this app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, suggesting a completely free experience.

### What are the different measurement modes?

The app offers three primary measurement modes: 'Single measure ruler' for measuring one line, 'Chain measure ruler' for measuring several lines consecutively, and 'Perimeter measure ruler' for calculating the perimeter of an area by connecting the last point back to the first.

### Can I use this app to measure the perimeter of a room?

Yes, the 'Perimeter measure ruler' mode is specifically designed for this purpose. You can measure the length of each wall by tapping the corners, and the app will calculate the total perimeter of the room.

## Version history (last 5 releases)

### 2.1 — 2020-04-04

SDK 13

### 2.0 — 2018-01-27

Completely new Ruler

### 1.7 — 2016-04-11

Fixed iPhone Plus issue

### 1.6 — 2016-03-30

fixed chashes on old iOS versions

### 1.5 — 2016-03-20

Bug fixed

## Apps similar to Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Tape Measure & Ruler Арр](https://appshunter.io/ios/app/tape-measure-and-ruler/id1453537222) | 4.2 (4,291) | Free | Utilities |
| [Ruler AR - Measuring Tape Cam](https://appshunter.io/ios/app/ruler-ar-measuring-tape-cam/id1279285953) | 4.3 (3,493) | Free | Utilities |
| [Measuring Tape +ㅤ](https://appshunter.io/ios/app/measuring-tape-plus/id1620141081) | 4.8 (5,123) | 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 |
| [Flying Ruler: 3D Tape Measure](https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844) | 4.1 (187) | $1.99 | Utilities |
| [Measure Tools: AR Room Planner](https://appshunter.io/ios/app/measure-tools-ar-room-planner/id1299651802) | 4.5 (143) | Free | Utilities |

## More apps by Anna Koynova

- [SpeedUp - Acceleration test 0-100 kmh 0-60 mph](https://appshunter.io/ios/app/speedup-acceleration-test-0-100-kmh-0-60-mph/id1038909469)
- [Ruler lite:tape measure length](https://appshunter.io/ios/app/ruler-litetape-measure-length/id1090427746)
- [dB meter - noise measure](https://appshunter.io/ios/app/db-meter-noise-measure/id1136677469)
- [dB meter lite - noise measure](https://appshunter.io/ios/app/db-meter-lite-noise-measure/id1148584989)
- [Sleep Sounds: relaxing sounds](https://appshunter.io/ios/app/sleep-sounds-relaxing-sounds/id1190758709)

All apps by Anna Koynova: https://appshunter.io/developer/1441894484

## Related topics

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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 2026-08-27.*