# Write ID vs ZQDataLog

The clearest difference is iOS requirement: Write ID at 9.0 against ZQDataLog's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Write ID ships an update every 6 weeks, ZQDataLog every 5 weeks. The most recent releases landed on September 11, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Write ID | ZQDataLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Size | 1 MB | 1 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Shenzhen Chileaf Eletronics Co., LTD](https://appshunter.io/developer/1460339012) | [榆 秦](https://appshunter.io/developer/1499965452) |

## What reviewers say

### Write ID

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

**In-app purchases:** none


### ZQDataLog

[App page](https://appshunter.io/ios/app/zqdatalog/id1535448218)

**In-app purchases:** none


## Frequently asked questions

### Is Write ID free?

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

### Is ZQDataLog free?

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

### Do Write ID or ZQDataLog have ads?

Neither Write ID nor ZQDataLog shows ads.

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

Write ID ships an update every 6 weeks, and ZQDataLog every 5 weeks. Most recently, Write ID was updated on September 11, 2026 and ZQDataLog on September 10, 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.*