# Epic Ruler vs cm Ruler, device size measure

The clearest difference is update cadence: cm Ruler, device size measure at every 5 days against Epic Ruler's every 17 months. cm Ruler, device size measure also leads on iOS requirement (17.0 vs 26.0). Epic Ruler's advantage is monetization model (free vs ad-supported) and ratings volume (4 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 1.0 for Epic Ruler against 1.0 for cm Ruler, device size measure. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Epic Ruler ships an update every 17 months, cm Ruler, device size measure every 5 days. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Epic Ruler | cm Ruler, device size measure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (4 ratings)](https://appshunter.io/ios/app/epic-ruler/id982728131/reviews) | [1.0 (1 ratings)](https://appshunter.io/ios/app/cm-ruler-device-size-measure/id6737493358/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 17 months | **Every 5 days** |
| Monetization | **Free** | Ad-supported |
| Size | 11 MB | 23 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Chih-Hao Chen](https://appshunter.io/developer/618207820) | [Taisuke Hosokawa](https://appshunter.io/developer/1585548762) |

## What reviewers say

### Epic Ruler

[App page](https://appshunter.io/ios/app/epic-ruler/id982728131)

Transform your smartphone into a portable measuring tool. Accurately measure lengths in both inches and centimeters directly from your device.

**Highlights:** Converts phone to ruler, Measures in inches, Measures in centimeters, Pocket-sized utility

**Features:** macOS Compatibility

**In-app purchases:** none


### cm Ruler, device size measure

[App page](https://appshunter.io/ios/app/cm-ruler-device-size-measure/id6737493358)

Transform your device into a versatile ruler for precise measurements. It displays width, height, and tapped positions, allowing you to record and share dimensions. Customize the ruler's appearance with different colors.

**Highlights:** Ruler UI for width and height, Measure tapped position size, Record and share measurements, Customizable ruler color

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

**In-app purchases:** none


## Frequently asked questions

### Is Epic Ruler free?

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

### Is cm Ruler, device size measure free?

cm Ruler, device size measure is free to download, with no in-app purchases.

### Which has better reviews, Epic Ruler or cm Ruler, device size measure?

Epic Ruler and cm Ruler, device size measure are both rated 1.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Epic Ruler or cm Ruler, device size measure have ads?

Both Epic Ruler and cm Ruler, device size measure show ads.

### Which is updated more often, Epic Ruler or cm Ruler, device size measure?

Epic Ruler ships an update every 17 months, and cm Ruler, device size measure every 5 days. Most recently, Epic Ruler was updated on October 2, 2026 and cm Ruler, device size measure on October 14, 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.*