# Ruler® vs Ruler

The clearest difference is rating: Ruler® at 4.3 against Ruler's 3.5. Ruler® also leads on ads (none vs shown) and ratings volume (35K vs 79). Ruler's advantage is review sentiment (40% vs 22%) and update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Ruler® sells 2 in-app purchases, starting at $1.99 per 7 days and Ruler sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Ruler® holds the better App Store score, 4.3 against 3.5. That said, the two scores are not equally well evidenced: Ruler® has 35K ratings behind it against 79, so its average is the more settled of the two. Written reviews complicate that: 22% of Ruler®'s written reviews are positive against 40% of Ruler's, so the app with the better star average is not the one people write more warmly about.

Ruler® ships an update every 2 months, Ruler every 3 weeks. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Ruler® | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (35K ratings)](https://appshunter.io/ios/app/ruler/id623207505/reviews)** | [3.5 (79 ratings)](https://appshunter.io/ios/app/ruler-cm-mm-inches/id1022857549/reviews) |
| Number of ratings | **35K** | 79 |
| Positive reviews | 21.9% of reviews | **40.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [Noadit, Inc.](https://appshunter.io/developer/1516754355) |

## What reviewers say

### Ruler®

[App page](https://appshunter.io/ios/app/ruler/id623207505)

This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.

**Highlights:** Classic ruler and tape measure, Camera ruler mode, Photo measures mode, Dual unit support (inches/cm), Precision sliders for small objects, Elegant and user-friendly interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Pro (Weekly) | $1.99 | per 7 days |
| Pro Features | $1.99 | one-time |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Easy to use
- 🔍 Convenient for small items
- 📏 Useful ruler tool

**What reviewers complain about**

- 💰 Paywall for basic features
- ⏱️ Limited free usage time
- 🔍 Inaccurate for larger objects
- 🙅‍♀️ Aggressive monetization tactics

**Reported bugs**

- Inconsistent measurements
- Compatibility issues with newer devices

**Requested features**

- Ability to switch between metric and imperial units without paying
- Improved accuracy for larger measurements
- Removal of time limits on free usage


### 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 (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $4.99 | per month |
| Sponsor | $4.99 | one-time |
| Sponsor | $19.99 | one-time |
| Sponsor | $99.99 | one-time |

**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


## Frequently asked questions

### Is Ruler® free?

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

### Is Ruler free?

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

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

Ruler® is rated higher. Ruler® averages 4.3 out of 5 from 35K ratings, while Ruler averages 3.5 from 79 ratings.

### Do Ruler® or Ruler have ads?

Ruler shows ads; Ruler® does not.

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

Ruler® ships an update every 2 months, and Ruler every 3 weeks. Most recently, Ruler® was updated on October 20, 2026 and Ruler on October 15, 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.*