# siro 公式アプリ vs Siro（シロ）

siro 公式アプリ and Siro（シロ） 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.

siro 公式アプリ ships an update every 39 months, Siro（シロ） every 20 months. The most recent releases landed on September 15, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | siro 公式アプリ | Siro（シロ） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 20 months** |
| Size | 31 MB | 3 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKATOSHI MORIHIRO](https://appshunter.io/developer/1606652618) | [shingo kamei](https://appshunter.io/developer/1256845824) |

## What reviewers say

### siro 公式アプリ

[App page](https://appshunter.io/ios/app/siro/id1606652616)

**In-app purchases:** none


### Siro（シロ）

[App page](https://appshunter.io/ios/app/siro/id1616519579)

**In-app purchases:** none


## Frequently asked questions

### Is siro 公式アプリ free?

siro 公式アプリ is free to download, with no in-app purchases.

### Is Siro（シロ） free?

Siro（シロ） is free to download, with no in-app purchases.

### Do siro 公式アプリ or Siro（シロ） have ads?

Neither siro 公式アプリ nor Siro（シロ） shows ads.

### Which is updated more often, siro 公式アプリ or Siro（シロ）?

siro 公式アプリ ships an update every 39 months, and Siro（シロ） every 20 months. Most recently, siro 公式アプリ was updated on September 15, 2026 and Siro（シロ） on September 8, 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.*