# 100cm Ruler vs SUGU！

The clearest difference is update cadence: SUGU！ at monthly against 100cm Ruler's every 3 months. 100cm Ruler's advantage is iOS requirement (12.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 100cm Ruler sells 1 one-off in-app purchase and SUGU！ sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

100cm Ruler ships an update every 3 months, SUGU！ monthly. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 100cm Ruler | SUGU！ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/100cm-ruler/id982815744/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 45.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 62 MB | 2 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZOOMO Inc.](https://appshunter.io/developer/490112424) | [Mano Kentaro](https://appshunter.io/developer/1866813177) |

## What reviewers say

### 100cm Ruler

[App page](https://appshunter.io/ios/app/100cm-ruler/id982815744)

This app provides a digital ruler for measuring the length and diameter of small objects directly on your device. It features a millimeter scale and allows for easy sliding to measure.

**Highlights:** Digital ruler functionality, Millimeter scale, Diameter measurement, Screen sliding for measurement, Ad removal option

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ADS | $1.99 | one-time |


### SUGU！

[App page](https://appshunter.io/ios/app/sugu/id6759054046)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |


## Frequently asked questions

### Is 100cm Ruler free?

100cm Ruler is free to download, with in-app purchases available.

### Is SUGU！ free?

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

### Do 100cm Ruler or SUGU！ have ads?

Neither 100cm Ruler nor SUGU！ shows ads.

### Which is updated more often, 100cm Ruler or SUGU！?

100cm Ruler ships an update every 3 months, and SUGU！ monthly. Most recently, 100cm Ruler was updated on October 14, 2026 and SUGU！ on October 10, 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.*