Comparison

ZeroScan vs Cellular Alarm Contact Sensor

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ZeroScan

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
Read full description

ZeroScan finds devices on your network that advertise Bonjour (mDNS / DNS-SD / zeroconf) services. It shows each one’s name, IP address, the services it offers and the ports they’re on, without probing your network. See what’s on your network Watches for 85 service types, including SSH, HTTP, AirPlay, printers, HomeKit and file sharing. You can add any other service type in preferences. Icons show what kind of device each one is likely to be: computer, phone, TV, printer, camera, router, storage and more. Shows each service’s TXT record, so you can see model names, firmware versions and device IDs. Results refresh on their own. You choose the rescan interval and how long a device stays listed after it stops advertising. Spot what changed Save a snapshot of a network and name it, like “Home” or “Office.” ZeroScan suggests which saved network you’re probably on. Compare the live scan with any saved snapshot. Devices are marked new, changed or gone, along with the services and ports that were added, removed or moved. “Show Changes Only” hides everything that hasn’t changed. Rename, merge or delete saved networks and snapshots. Take results with you Export the full scan as CSV or JSON. Copy a hostname, IP address or port list in the format you pick. On iOS, open HTTP, HTTPS, SSH and SFTP services directly in the app that handles them. What ZeroScan isn’t ZeroScan isn’t an IP scanner. It listens for devices that announce themselves and never probes addresses. A device that doesn’t advertise one of the services ZeroScan watches for won’t appear. Privacy ZeroScan collects no data and sends nothing off your device. Your snapshots and preferences are saved on the device and nowhere else.

About

Cellular Alarm Contact Sensor

Features
Read full description

Cellular alarm contact sensor with power monitoring allows you to monitor any doors, windows, gates, trailer and many more. Get notified via SMS or email when the sensor is triggered or when power loss is detected.

Screenshots

ZeroScan4 screens
Cellular Alarm Contact Sensor4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
ZeroScan versus Cellular Alarm Contact Sensor: the parameters behind the verdict, then further details
ParameterZeroScanCellular Alarm Contact Sensor
Price$0.99Free — better
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 6 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.013.4 — better
Further details — not scored
Size1 MB2 MB
Age rating4+4+
DeveloperJordan ParsonsRobert Taraszka

In-app purchases

None

ZeroScan

No in-app purchases

None

Cellular Alarm Contact Sensor

No in-app purchases

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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