# Ruler • — Includes Camera (AR) Ruler

> On-screen and AR ruler for measuring dimensions, angles, area, volume, and paths. (iPhone/iPad app by Matrix Software Co..)

- Source: https://appshunter.io/ios/app/ruler/id1555214809 (this page in markdown: same URL + `.md`)
- Developer: [Matrix Software Co.](https://appshunter.io/developer/1457004046)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.20/5 from 399 App Store ratings · 27 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 6 MB
- Languages: American English, Arabic, Danish, Dutch, Finnish, French (France), German (Germany), Hebrew, Indonesian, Italian and 11 more
- Released: 2021-03-05
- Data updated: 2026-08-26
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/ruler/id1555214809/reviews.md

## What is Ruler?

Measure everything with a beautiful on-screen ruler. 
Choose between inches and centimeters. 
Tap the screen to start using the best multi-touch measuring system and find the size of all curious objects around you. 
Also with your camera measure everything accurate by using Augmented Reality (AR) feature.


1) Allows to tape measure linear sizes in cm,  inches
2) With Bubble meter allows you to level objects horizontal
3) Save measurments
4) Allows to tape measure distance from device camera to a fixed point on the detected 3D plane.
5) Angle – allows to tape measure corners on 3D planes.
6) Area and Perimeter – allows to tape measure perimeter and area of the room.
7) Volume – allows to tape measure size of 3D objects.
8) Path – allows to calculate the length and area of the path.
9) Height – allows to tape measure height relative to the recognized surface.
10) Plan – generates plan projection for drawn objects and exports it .
11) On-screen Ruler app – measure small objects directly on the smartphone’s screen.

## Key features

- On-screen ruler for small objects
- Augmented Reality (AR) measuring
- Measure linear sizes in cm/inches
- Calculate angles, area, and volume
- Save measurements
- Generate plan projections

## Recent user reviews (10 of 27)

All indexed reviews: https://appshunter.io/ios/app/ruler/id1555214809/reviews.md

### 3/5 — The app still crashes

*2026-08-06*

The app still crashes on my iPhone 17 and IPad after restarting tried everything whenever I measure the height of something, could you please make a new app update? It still hasn’t been fixed yet.

**Developer response:** Thank you for your feedback, and we’re sorry for the inconvenience.

We understand that the app is crashing on both iPhone and iPad when measuring height. This is not the experience we want, and it may be related to device-specific AR processing or a bug in the measurement module.

Please make sure you’re using the latest version of the app and restart your device. If the issue continues, contact our support team with your device models and iOS versions so we can investigate and fix it.

Thanks for reporting this — it helps us improve stability.

### 1/5 — Basically a sales tool.

*2026-08-02*

Will do nothing except measure 5” without paying. Cannot even switch to metric. 
The App world is dying due to the endless useless apps like this one.

**Developer response:** Thank you for your feedback. We're sorry the app didn't meet your expectations. Could you please let us know which phone model you're using? This information will help us investigate the issue. We appreciate your comments and are always looking for ways to improve the app and user experience.

### 3/5 — Mostly ok

*2026-05-29*

Simple basic app. Displays inches and cm scales. Nice basic caliper usage too and bonus spirit level. But no clue how to use AR mode.  Camera on, screen shows green grids and nothing more.  No save or print ability.  Unable to select objects. Unable to back out of AR mode. 
Using iphone 15 pro max with os 26.5.

**Developer response:** Thank you for your feedback, and we’re sorry for the confusion and inconvenience.

We understand the issue with AR mode not responding as expected, including the inability to select objects or exit properly. This may be related to device compatibility, ARKit initialization, or a UI control issue on certain iOS versions.

We also appreciate your suggestions regarding save/print functionality and improving usability. These are valuable improvements and will be considered for future updates.

Please ensure you are using the latest version of the app, and if the issue persists, contact support with your device details so we can investigate further.

### 5/5 — All his/her gadgets

*2026-01-18*

They all work well so far also has selection to Do not sell information or share my data I download all free ones testing came out well so far

**Developer response:** Thank you for your feedback! We’re glad to hear the apps are working well for you and that you appreciate the privacy options, including the “do not sell/share data” setting.

It’s great to know your testing experience has been positive so far. Your support means a lot to us!

### 1/5 — Tracking / ads

*2025-10-12*

This is not an app for me

**Developer response:** Thank you for your feedback. We’re sorry the app didn’t meet your needs and appreciate you giving it a try.

### 2/5 — Can't switch to cm

*2025-10-08*

Very promising but a very basic functionality is not available: can't switch to cm, needs fixing asap

**Developer response:** Thank you for your feedback! The option to switch to cm is available via the button under the display. We hope this helps!

### 3/5 — Downloaded, opened, and problems

*2025-09-27*

I have very little knowledge of this app other than what is said in the other reviews. I wanted to test it and did. 3 out of 5 stars bc when I went to measure a surface, it did not allow me to pick the right point. Apps should work right out of the Store.

**Developer response:** Thank you for your feedback. We’re sorry for the difficulty you experienced when selecting points. Please make sure to tap carefully on the screen, and we’ll continue working to improve usability in future updates.

### 1/5 — Out of scale

*2025-09-06*

Out of scale, Crashed within 1 minute. Deleted immediately. 16 pro max

### 1/5 — Needs update

*2025-06-08*

Way out of scale on my current phone, needs to be updated.

**Developer response:** Thanks for your feedback! We’re sorry to hear the ruler app is out of scale on your phone. Our team is looking into compatibility issues with newer phone models and working on an update to fix scaling problems. Please share your phone model so we can investigate further. Thanks for your patience!

### 5/5 — Change to cm does not work!!?

*2025-05-23*

After I updated this app to last version ,switch to cm metric doesn’t work.it still shows inch!!? This app with cm metric is fantastic. Without it, it is useless!!

**Developer response:** Thank you for your feedback! This issue has already been fixed — please make sure you are using the latest updated version of the app.

## Frequently asked questions about Ruler

### What can I measure with this app?

You can measure linear sizes in centimeters and inches, distances using augmented reality, angles, area, perimeter, volume of 3D objects, and the length/area of paths. It also includes an on-screen ruler for measuring small objects directly on your smartphone's screen.

### How does the Augmented Reality (AR) feature work?

The AR feature allows you to accurately measure distances from your device's camera to points on a detected 3D plane. This enables you to measure larger objects or spaces that wouldn't fit on your screen.

### Is this app free to use?

Yes, the app is free to use. However, it does display advertisements to support its development and maintenance.

### Can I save my measurements?

Yes, the app allows you to save your measurements. This is useful for keeping track of dimensions for projects or for future reference.

### What devices is this app compatible with?

While specific compatibility details are not provided, AR features typically require devices that support ARKit (for iOS) or ARCore (for Android). The on-screen ruler functionality should be broadly compatible with most smartphones.

## Version history (last 5 releases)

### 1.5 — 2026-04-16

Fixed crash bugs

### 1.4 — 2025-02-21

Fixed crash bugs

### 1.3 — 2025-01-07

Ruler updated for new types of models

### 1.2 — 2022-04-27

Fixed crash bugs

### 1.1 — 2021-03-15

Fixed crush bug
Integrated Admob SDK

## Apps similar to Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Measuring Tape+ Measure AR app](https://appshunter.io/ios/app/measuring-tape-plus-measure-ar-app/id6444381350) | 4.5 (2,022) | Free | Utilities |
| [Measurement app for iPhone](https://appshunter.io/ios/app/measurement-app-for-iphone/id1586541589) | 4.8 (108) | Free | Utilities |
| [Ruler AR - Measuring Tape Cam](https://appshunter.io/ios/app/ruler-ar-measuring-tape-cam/id1279285953) | 4.3 (3,493) | Free | Utilities |
| [Ruler, Measuring Tape - AR App](https://appshunter.io/ios/app/ruler-measuring-tape-ar-app/id1462163605) | 4.3 (1,026) | Free | Utilities |
| [Tape Measure & Ruler Арр](https://appshunter.io/ios/app/tape-measure-and-ruler/id1453537222) | 4.2 (4,291) | Free | Utilities |
| [The Tape Measure & 3D Scanner](https://appshunter.io/ios/app/the-tape-measure-and-3d-scanner/id1564249382) | 4.4 (3,887) | Free | Utilities |

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All apps by Matrix Software Co.: https://appshunter.io/developer/1457004046

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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 2026-08-26.*