# Cellular Alarm Contact Sensor vs PowerDetector

The clearest difference is update cadence: Cellular Alarm Contact Sensor at every 3 weeks against PowerDetector's every 2 months. Cellular Alarm Contact Sensor also leads on iOS requirement (13.4 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Cellular Alarm Contact Sensor ships an update every 3 weeks, PowerDetector every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Cellular Alarm Contact Sensor | PowerDetector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 2 MB | 7 MB |
| Requires iOS | **13.4** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robert Taraszka](https://appshunter.io/developer/1518710123) | [River Rock Logic](https://appshunter.io/developer/340225113) |

## What reviewers say

### Cellular Alarm Contact Sensor

[App page](https://appshunter.io/ios/app/cellular-alarm-contact-sensor/id1518710124)

**Features:** macOS Compatibility

**In-app purchases:** none


### PowerDetector

[App page](https://appshunter.io/ios/app/powerdetector/id6738153000)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cellular Alarm Contact Sensor free?

Cellular Alarm Contact Sensor is free to download, with no in-app purchases.

### Is PowerDetector free?

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

### Do Cellular Alarm Contact Sensor or PowerDetector have ads?

Neither Cellular Alarm Contact Sensor nor PowerDetector shows ads.

### Which is updated more often, Cellular Alarm Contact Sensor or PowerDetector?

Cellular Alarm Contact Sensor ships an update every 3 weeks, and PowerDetector every 2 months. Most recently, Cellular Alarm Contact Sensor was updated on November 3, 2026 and PowerDetector on November 4, 2026.

---

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