# mm（ミリ） vs SOWELU（ソエル）

mm（ミリ） and SOWELU（ソエル） are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

mm（ミリ） ships an update every 27 months, SOWELU（ソエル） every 42 months. The most recent releases landed on October 6, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | mm（ミリ） | SOWELU（ソエル） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 42 months |
| Size | 3 MB | 4 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naoya Takahashi](https://appshunter.io/developer/1301211980) | [Masahito Idogawa](https://appshunter.io/developer/1620526909) |

## What reviewers say

### mm（ミリ）

[App page](https://appshunter.io/ios/app/mm/id1555989314)

**In-app purchases:** none


### SOWELU（ソエル）

[App page](https://appshunter.io/ios/app/sowelu/id1620526907)

**In-app purchases:** none


## Frequently asked questions

### Is mm（ミリ） free?

mm（ミリ） is free to download, with no in-app purchases.

### Is SOWELU（ソエル） free?

SOWELU（ソエル） is free to download, with no in-app purchases.

### Do mm（ミリ） or SOWELU（ソエル） have ads?

Neither mm（ミリ） nor SOWELU（ソエル） shows ads.

### Which is updated more often, mm（ミリ） or SOWELU（ソエル）?

mm（ミリ） ships an update every 27 months, and SOWELU（ソエル） every 42 months. Most recently, mm（ミリ） was updated on October 6, 2026 and SOWELU（ソエル） on October 27, 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.*