# ZeroScan vs Cellular Alarm Contact Sensor

The clearest difference is price: Cellular Alarm Contact Sensor at Free against ZeroScan's $0.99. Cellular Alarm Contact Sensor also leads on update cadence (every 3 weeks vs every 6 months) and iOS requirement (13.4 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Cellular Alarm Contact Sensor is free to download; ZeroScan costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZeroScan ships an update every 6 months, Cellular Alarm Contact Sensor every 3 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ZeroScan | Cellular Alarm Contact Sensor |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zeroscan/id1508942351/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jordan Parsons](https://appshunter.io/developer/1508942350) | [Robert Taraszka](https://appshunter.io/developer/1518710123) |

## What reviewers say

### ZeroScan

[App page](https://appshunter.io/ios/app/zeroscan/id1508942351)

Discover network devices and their services effortlessly. This tool listens for broadcasting zeroconf services, displaying IP addresses and open ports without active probing. Customize scan intervals and result display for a seamless network overview.

**Highlights:** Zeroconf (mDNS, DNS-SD, Bonjour) service discovery, Automatic network rescanning, Customizable scan intervals, Adjustable result display duration, Clipboard copy customization, Manual service searching

**Features:** Vision Pro support

**In-app purchases:** none


### Cellular Alarm Contact Sensor

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZeroScan free?

ZeroScan costs $0.99, with no in-app purchases.

### Is Cellular Alarm Contact Sensor free?

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

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

Neither ZeroScan nor Cellular Alarm Contact Sensor shows ads.

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

ZeroScan ships an update every 6 months, and Cellular Alarm Contact Sensor every 3 weeks. Most recently, ZeroScan was updated on October 29, 2026 and Cellular Alarm Contact Sensor on October 27, 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.*