# must be one vs 모아세

The clearest difference is ads: 모아세 at none against must be one's shown. 모아세 also leads on update cadence (every 2 days vs every 5 weeks). must be one's advantage is iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support there is nothing between them.

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

must be one ships an update every 5 weeks, 모아세 every 2 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | must be one | 모아세 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Size | 6 MB | 171 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [office-canard games](https://appshunter.io/developer/6793797221) | [SeongMin Seo](https://appshunter.io/developer/6804216455) |

## What reviewers say

### must be one

[App page](https://appshunter.io/ios/app/must-be-one/id6794124997)

**In-app purchases:** none


### 모아세

[App page](https://appshunter.io/ios/app/id6809677968)

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

**In-app purchases:** none


## Frequently asked questions

### Is must be one free?

must be one is free to download, with no in-app purchases.

### Is 모아세 free?

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

### Do must be one or 모아세 have ads?

must be one shows ads; 모아세 does not.

### Which is updated more often, must be one or 모아세?

must be one ships an update every 5 weeks, and 모아세 every 2 days. Most recently, must be one was updated on October 31, 2026 and 모아세 on October 29, 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.*