Comparison

qw 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

Free

🔧 Utilities

No ratingsView app →

Cellular Alarm Contact Sensor

Free

🔧 Utilities

No ratingsView app →

About

qw

Features

Read full description

This App is a demonstrator for QR-Codes on EuroWeld certificates. You can read QR-Codes that are created by the program EuroWeld. CertChecker analyses the QR-Code and shows the parts in a readable form. Additional it checks the signature and says if it is valid or invalid. With the Certipedia-Button you can call the official Certipedia-Website to check your EuroWeld certificate.

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

qw2 screens

Cellular Alarm Contact Sensor4 screens

Verdict

The call

The clearest difference is update cadence: Cellular Alarm Contact Sensor at every 3 weeks against qw's every 20 months. Cellular Alarm Contact Sensor also leads on iOS requirement (13.4 vs 15.0). On price, 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

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

UpkeepUpdate frequency

qw ships an update every 20 months, Cellular Alarm Contact Sensor every 3 weeks. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

Scorecard2 real differences · 4 level

qw versus Cellular Alarm Contact Sensor: the parameters behind the verdict, then further details
Parameter	qw	Cellular Alarm Contact Sensor
Price	Free	Free
Update frequency	Every 20 months	Every 3 weeks — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	13.4 — better
Further details — not scored
Size	1 MB	2 MB
Age rating	4+	4+
Developer	Rainer Hagemann	Robert Taraszka

In-app purchases

None

qw

No in-app purchases

None

Cellular Alarm Contact Sensor

No in-app purchases

Questions

Is qw free?

qw is free to download, 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 qw or Cellular Alarm Contact Sensor have ads?

Neither qw nor Cellular Alarm Contact Sensor shows ads.

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

qw ships an update every 20 months, and Cellular Alarm Contact Sensor every 3 weeks. Most recently, qw was updated on October 19, 2026 and Cellular Alarm Contact Sensor on October 18, 2026.