# Ruler vs iRuler Plus

The clearest difference is rating: Ruler at 3.5 against iRuler Plus's 1.7. Ruler also leads on review sentiment (40% vs 0%) and in-app purchases (none vs 1). iRuler Plus's advantage is iOS requirement (9.0 vs 17.0). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. iRuler Plus sells 1 one-off in-app purchase. Ruler asks for nothing beyond the download.

Ruler holds the better App Store score, 3.5 against 1.7. That said, the two scores are not equally well evidenced: Ruler has 79 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 40% of Ruler's written reviews are positive against 0% of iRuler Plus's.

Ruler ships an update every 3 weeks, iRuler Plus every 52 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Ruler | iRuler Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (79 ratings)](https://appshunter.io/ios/app/ruler-cm-mm-inches/id1022857549/reviews)** | [1.7 (15 ratings)](https://appshunter.io/ios/app/iruler-plus/id1215565638/reviews) |
| Number of ratings | **79** | 15 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 52 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 11 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [CONG DUC TRAN](https://appshunter.io/developer/596643264) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-cm-mm-inches/id1022857549)

Measure lengths, widths, and diagonals accurately using your phone. Switch between metric and imperial units, and utilize flexible starting points for precise measurements in any direction. Features auto-calibration for minimal error and a screen lock to preserve readings.

**Highlights:** Multi-mode measurement (CM, MM, Inches, Fractions), Flexible starting points, Full-direction measurement (horizontal, vertical, diagonal), Auto-calibration for accuracy, Screen lock for preserving readings, Ad-free VIP option

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 📏 Accurate measurements (for some)
- 💡 Useful for small objects
- ✨ Clean interface
- 🚀 Fluid performance

**What reviewers complain about**

- 😠 Excessive and intrusive ads
- 🚫 Ads block measurements
- 🔊 Loud and shocking ads
- 💸 No option to pay for ad-free (or purchase lost)
- 📉 Inaccurate inch measurements (decimal vs. fractional)

**Reported bugs**

- Ads pop up constantly, making app unusable
- Ads overlay the ruler/measurements
- App crashes constantly
- Black screen issue
- Inaccurate measurements (especially inches)

**Requested features**

- Option to remove ads via one-time purchase
- Ability to calibrate the ruler
- Offset crosshairs to see numbers
- Fractional inch (1/8, 1/16) display option
- Option to hide ruler digits


### iRuler Plus

[App page](https://appshunter.io/ios/app/iruler-plus/id1215565638)

Measure lengths in centimeters or inches with this virtual ruler app. It offers a user-friendly interface with customizable color themes and styles. Easily measure small objects or long items up to 120 cm.

**Highlights:** Measure in cm or inches, Up to 120 cm scroll ruler, Measure small objects with stick ruler, Multiple ruler themes and colors, Easy to use interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iRuler Premium | $1.99 | one-time |


## Frequently asked questions

### Is Ruler free?

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

### Is iRuler Plus free?

iRuler Plus is free to download, with in-app purchases available.

### Which has better reviews, Ruler or iRuler Plus?

Ruler is rated higher. Ruler averages 3.5 out of 5 from 79 ratings, while iRuler Plus averages 1.7 from 15 ratings.

### Do Ruler or iRuler Plus have ads?

Both Ruler and iRuler Plus show ads.

### Which is updated more often, Ruler or iRuler Plus?

Ruler ships an update every 3 weeks, and iRuler Plus every 52 months. Most recently, Ruler was updated on November 1, 2026 and iRuler Plus on November 2, 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.*