# Ruler vs Maple Tool

The clearest difference is ads: Maple Tool at none against Ruler's shown. Maple Tool also leads on update cadence (every 2 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Ruler sells 4 in-app purchases, starting at $4.99 per month and Maple Tool sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Ruler ships an update every 3 weeks, Maple Tool every 2 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ruler | Maple Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (79 ratings)](https://appshunter.io/ios/app/ruler-cm-mm-inches/id1022857549/reviews)** | — |
| Number of ratings | **79** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 58 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [Chih-Kang Fang](https://appshunter.io/developer/1556169596) |

## 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 (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


### Maple Tool

[App page](https://appshunter.io/ios/app/maple-tool/id6798004758)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Maple Tool Pro | $0.99 | per month |
| Maple Tool Pro | $8.99 | per year |


## Frequently asked questions

### Is Ruler free?

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

### Is Maple Tool free?

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

### Do Ruler or Maple Tool have ads?

Ruler shows ads; Maple Tool does not.

### Which is updated more often, Ruler or Maple Tool?

Ruler ships an update every 3 weeks, and Maple Tool every 2 days. Most recently, Ruler was updated on October 24, 2026 and Maple Tool on October 31, 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.*