# Screen Ruler vs Ruler

The clearest difference is review sentiment: Screen Ruler at 55% against Ruler's 15%. Screen Ruler also leads on update cadence (every 3 months vs every 14 months). Ruler's advantage is rating (4.2 vs 3.7) and in-app purchases (none vs 2). On price, ads and device support there is nothing between them.

Both are free to download. Screen Ruler sells 2 one-off in-app purchases. Ruler asks for nothing beyond the download.

Ruler holds the better App Store score, 4.2 against 3.7. That said, the two scores are not equally well evidenced: Ruler has 419 ratings behind it against 26, so its average is the more settled of the two. Written reviews complicate that: 55% of Screen Ruler's written reviews are positive against 15% of Ruler's, so the app with the better star average is not the one people write more warmly about.

Screen Ruler ships an update every 3 months, Ruler every 14 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Screen Ruler | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (26 ratings)](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735/reviews) | **[4.2 (419 ratings)](https://appshunter.io/ios/app/ruler/id1555214809/reviews)** |
| Number of ratings | 26 | **419** |
| Positive reviews | **54.8% of reviews** | 15.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 months** | Every 14 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 18 MB | 6 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [向阳 杨](https://appshunter.io/developer/1174757734) | [Matrix Software Co.](https://appshunter.io/developer/1457004046) |

## What reviewers say

### Screen Ruler

[App page](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735)

Turn your iPhone or iPad into a precise measuring tool. Easily measure lengths in centimeters or inches with features like magnifier mode and haptic feedback. Ideal for daily tasks, office use, DIY projects, and on-the-go measurements.

**Highlights:** Dual units (cm/inches), Precision calibration, Magnifier mode, Haptic feedback, Clean interface, Save and label measurements

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ads-free experience | $1.99 | one-time |
| Support for a cup of coffee | $2.99 | one-time |


### Ruler

[App page](https://appshunter.io/ios/app/ruler/id1555214809)

Measure objects and distances with an on-screen ruler and augmented reality. Supports inches and centimeters, with features for linear sizes, angles, area, volume, and more. Save your measurements for later use.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

- 📏 Inaccurate measurements
- 💥 Frequent app crashes
- 💸 Limited free functionality (5" limit)
- 🚫 Cannot switch to metric (cm)
- 🤷 Unclear AR mode usage

**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

**Requested features**

- Fix crashing issues
- Enable switching to metric (cm)
- Improve AR mode usability
- Add save and print functionality
- Provide usage instructions


## Frequently asked questions

### Is Screen Ruler free?

Screen Ruler is free to download, with in-app purchases available.

### Is Ruler free?

Ruler is free to download, with no in-app purchases.

### Which has better reviews, Screen Ruler or Ruler?

Ruler is rated higher. Screen Ruler averages 3.7 out of 5 from 26 ratings, while Ruler averages 4.2 from 419 ratings.

### Do Screen Ruler or Ruler have ads?

Both Screen Ruler and Ruler show ads.

### Which is updated more often, Screen Ruler or Ruler?

Screen Ruler ships an update every 3 months, and Ruler every 14 months. Most recently, Screen Ruler was updated on October 26, 2026 and Ruler on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*