# Ruler • — user reviews

> 28 indexed App Store user reviews of Ruler by Matrix Software Co., rated 4.20/5 from 405 ratings.

- Source: https://appshunter.io/ios/app/ruler/id1555214809/reviews
- App overview in markdown: https://appshunter.io/ios/app/ruler/id1555214809.md
- Rating breakdown: 5★ 282 · 4★ 37 · 3★ 20 · 2★ 16 · 1★ 50

## What do users think of Ruler?

Overall sentiment: negative

**Pros**

- 👍 Basic caliper and spirit level included
- ✅ Option to opt-out of data selling/sharing
- 👌 Accurate measurements (Arabic review)

**Cons**

- 📏 Inaccurate measurements
- 💥 Frequent app crashes
- 💸 Limited free functionality (5" limit)
- 🚫 Cannot switch to metric (cm)
- 🤷 Unclear AR mode usage
- ❌ No save or print option
- ↩️ Unable to exit AR mode
- ❓ No instructions on how to use
- 📱 Assumes a single phone size
- 📉 Ruler markings are incorrect (10ths instead of 16ths)
- 👎 Generally poor user experience

**Commonly reported bugs**

- App crashes on iPhone 17 and iPad
- App crashes within 1 minute
- AR mode not functional
- Cannot switch to cm
- Measurements are out of scale
- Centimeter measurement is wrong
- Ruler markings are wrong (10ths instead of 16ths)
- iPhone 14 Pro Max measured as over 9 inches

**Most requested features**

- Fix crashing issues
- Enable switching to metric (cm)
- Improve AR mode usability
- Add save and print functionality
- Provide usage instructions
- Ensure accurate scaling for all devices
- Fix ruler marking divisions

## Newest reviews (8 of 28)

### 2/5 — Lousy

*2024-11-09*

There’s no info on how to use this thing!!!

### 1/5 — Ruler markings are wrong.

*2024-07-27*

Inches are shown divided into 10ths instead of 16ths.

### 1/5 — Worst ruler

*2024-02-21*

Off by a lot

### 1/5 — worst

*2024-02-15*

may be its not suite to my phone .. there is huge difference between the physical ruler vs app

### 1/5 — Bad app

*2024-02-09*

Measurements presented on screen are not accurate.

### 1/5 — Wrong

*2024-01-08*

It thinks the iPhone 14 Pro Max is over 9 inches long

### 1/5 — Not accurate measurement

*2023-09-04*

Not accurate measurement

### 1/5 — Wrong size

*2023-06-01*

This would be a great ruler app but the length of the rules is wrong on an iPhone 13 Pro.

## Most critical reviews (10 lowest-rated)

### 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.

### 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.

### 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!

### 1/5 — Cm sorunu

*2025-01-11, version 1.3*

Cm seçince inç kalıyor

### 1/5 — 1 inch in reality is measured as 1 3/4.

*2024-10-30*

WOW. The dev only consider one phone size?

### 1/5 — Crap

*2024-10-24*

An inch is not an inch in this app. Garbage.

### 1/5 — Totalmente fora de escala

*2024-09-08*

Totalmente fora de escala

### 1/5 — Redponse

*2024-08-25*

How to use?????

### 1/5 — Wrong mesurement

*2024-08-06, version 1.2*

The centimeter measurement is wrong.

## Most praised reviews (10 highest-rated)

### 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!

### 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.

### 5/5 — worst ruler app ever

*2023-12-25*

the measurement is way too off

### 5/5 — تطبيق للقياسات في منتهى الدقة

*2023-03-26*

قياسات بالسنتمتر والانش ومعرفة مسوى الميول بفضل الميزان المائي المرفق بالتطبيق👌👍🏻

### 3/5 — The app still crashes

*2026-08-17*

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.

### 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.

### 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.

### 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.

### 3/5 — Change to cm does not work!!?

*2025-04-05*

When switch to cm metric , it still shows inch!!?

**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.

### 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!

---

*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 2026-09-09.*