# studio//M's vs うんちスキャン

The clearest difference is in-app purchases: studio//M's at none against うんちスキャン's 1. うんちスキャン's advantage is update cadence (every 3 months vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. うんちスキャン sells 1 in-app purchase, starting at $0.99 per month. studio//M's asks for nothing beyond the download.

studio//M's ships an update every 8 months, うんちスキャン every 3 months. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | studio//M's | うんちスキャン |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Size | 92 MB | 32 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Active Media Corp.](https://appshunter.io/developer/736484999) | [KIY, K.K.](https://appshunter.io/developer/1881024821) |

## What reviewers say

### studio//M's

[App page](https://appshunter.io/ios/app/studioms/id1497669584)

**In-app purchases:** none


### うんちスキャン

[App page](https://appshunter.io/ios/app/ai/id6759829585)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| うんちスキャン プレミアム | $0.99 | per month |


## Frequently asked questions

### Is studio//M's free?

studio//M's is free to download, with no in-app purchases.

### Is うんちスキャン free?

うんちスキャン is free to download, with in-app purchases available.

### Do studio//M's or うんちスキャン have ads?

Neither studio//M's nor うんちスキャン shows ads.

### Which is updated more often, studio//M's or うんちスキャン?

studio//M's ships an update every 8 months, and うんちスキャン every 3 months. Most recently, studio//M's was updated on October 20, 2026 and うんちスキャン on October 15, 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.*