# 星月 vs Rubber Clock

The clearest difference is in-app purchases: 星月 at none against Rubber Clock's 3. 星月 also leads on iOS requirement (15 vs 18.4). Rubber Clock's advantage is update cadence (every 5 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Rubber Clock sells 3 one-off in-app purchases. 星月 asks for nothing beyond the download.

星月 ships an update every 2 weeks, Rubber Clock every 5 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 星月 | Rubber Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 43 MB | 111 MB |
| Requires iOS | **15** | 18.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [浙江星月实业有限公司](https://appshunter.io/developer/1800399575) | [传河 张](https://appshunter.io/developer/1789789418) |

## What reviewers say

### 星月

[App page](https://appshunter.io/ios/app/id6742870171)

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

**In-app purchases:** none


### Rubber Clock

[App page](https://appshunter.io/ios/app/rubber-clock/id6763499552)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Eraser Pack | $0.99 | one-time |
| Medium Eraser Pack | $1.99 | one-time |
| Large Eraser Pack | $2.99 | one-time |


## Frequently asked questions

### Is 星月 free?

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

### Is Rubber Clock free?

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

### Do 星月 or Rubber Clock have ads?

Neither 星月 nor Rubber Clock shows ads.

### Which is updated more often, 星月 or Rubber Clock?

星月 ships an update every 2 weeks, and Rubber Clock every 5 days. Most recently, 星月 was updated on October 18, 2026 and Rubber Clock on October 11, 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.*