# IoTEmeter vs Detector Air

The clearest difference is in-app purchases: IoTEmeter at none against Detector Air's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Detector Air sells 3 in-app purchases, starting at $3.99 per 7 days. IoTEmeter asks for nothing beyond the download.

IoTEmeter ships an update every 3 weeks, Detector Air every 2 weeks. Both last shipped on November 12, 2026.

## The numbers

| Metric | IoTEmeter | Detector Air |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 38 MB | 12 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Smart Charging Technologies](https://appshunter.io/developer/1505114112) | [晓伟 李](https://appshunter.io/developer/1533261370) |

## What reviewers say

### IoTEmeter

[App page](https://appshunter.io/ios/app/iotemeter/id6463869596)

**Features:** macOS Compatibility

**In-app purchases:** none


### Detector Air

[App page](https://appshunter.io/ios/app/detector-air-find-my-device/id6474296030)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $3.99 | per 7 days |
| Monthly subscription | $9.99 | per month |
| Yearly subscription | $29.99 | per year |


## Frequently asked questions

### Is IoTEmeter free?

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

### Is Detector Air free?

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

### Do IoTEmeter or Detector Air have ads?

Neither IoTEmeter nor Detector Air shows ads.

### Which is updated more often, IoTEmeter or Detector Air?

IoTEmeter ships an update every 3 weeks, and Detector Air every 2 weeks. Most recently, IoTEmeter was updated on November 12, 2026 and Detector Air on November 12, 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.*