# Ruler vs PicPdf2epub

The clearest difference is in-app purchases: Ruler at none against PicPdf2epub's 1. Ruler also leads on iOS requirement (13.0 vs 16.0). PicPdf2epub's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. PicPdf2epub sells 1 in-app purchase, starting at $2.99 per year. Ruler asks for nothing beyond the download.

## The numbers

| Metric | Ruler | PicPdf2epub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (405 ratings)](https://appshunter.io/ios/app/ruler/id1555214809/reviews)** | — |
| Number of ratings | **405** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | — |
| Monetization | Ad-supported | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matrix Software Co.](https://appshunter.io/developer/1457004046) | [Shun Kuo Han](https://appshunter.io/developer/1814402621) |

## What reviewers say

### 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


### PicPdf2epub

[App page](https://appshunter.io/ios/app/picpdf2epub/id6792299618)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pic2epub Pro 年訂閱 | $2.99 | per year |


## Frequently asked questions

### Is Ruler free?

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

### Is PicPdf2epub free?

PicPdf2epub is free to download, with in-app purchases available.

### Do Ruler or PicPdf2epub have ads?

Ruler shows ads; PicPdf2epub does not.

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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.*