# Write ID vs Device Detection

The clearest difference is in-app purchases: Write ID at none against Device Detection's 2. Write ID also leads on ads (none vs shown) and iOS requirement (9.0 vs 16.0). Device Detection's advantage is update cadence (every 4 days vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Device Detection sells 2 in-app purchases, starting at $7.99 per 7 days. Write ID asks for nothing beyond the download.

Write ID ships an update every 6 weeks, Device Detection every 4 days. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Write ID | Device Detection |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 1 MB | 195 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Shenzhen Chileaf Eletronics Co., LTD](https://appshunter.io/developer/1460339012) | [Kristina Parks](https://appshunter.io/developer/1819476210) |

## What reviewers say

### Write ID

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

**In-app purchases:** none


### Device Detection

[App page](https://appshunter.io/ios/app/device-detection-revealy/id6748017063)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hidden Camera Detect: Reveal.Y | $7.99 | per 7 days |
| Hidden Camera Detect: Reveal.Y | $8.99 | per 7 days |


## Frequently asked questions

### Is Write ID free?

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

### Is Device Detection free?

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

### Do Write ID or Device Detection have ads?

Device Detection shows ads; Write ID does not.

### Which is updated more often, Write ID or Device Detection?

Write ID ships an update every 6 weeks, and Device Detection every 4 days. Most recently, Write ID was updated on November 7, 2026 and Device Detection on November 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*