# Write ID vs Periphery

The clearest difference is in-app purchases: Write ID at none against Periphery's 4. Write ID also leads on ads (none vs shown) and iOS requirement (9.0 vs 17.0). Periphery's advantage is update cadence (weekly vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Periphery sells 4 in-app purchases, starting at $0.99 per 7 days. Write ID asks for nothing beyond the download.

Write ID ships an update every 6 weeks, Periphery weekly. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Write ID | Periphery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 1 MB | 6 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Shenzhen Chileaf Eletronics Co., LTD](https://appshunter.io/developer/1460339012) | [Grima Hdez](https://appshunter.io/developer/1741481582) |

## What reviewers say

### Write ID

[App page](https://appshunter.io/ios/app/write-id/id1494859636)

**In-app purchases:** none


### Periphery

[App page](https://appshunter.io/ios/app/periphery-bluetooth-scanner/id6785811488)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Periphery Pro Weekly | $0.99 | per 7 days |
| Periphery Pro Monthly | $1.99 | per month |
| Periphery Pro Yearly | $2.99 | per year |
| Periphery Pro Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is Write ID free?

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

### Is Periphery free?

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

### Do Write ID or Periphery have ads?

Periphery shows ads; Write ID does not.

### Which is updated more often, Write ID or Periphery?

Write ID ships an update every 6 weeks, and Periphery weekly. Most recently, Write ID was updated on October 25, 2026 and Periphery 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.*