Comparison

Cellular Alarm Contact Sensor vs Notifya

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

Head to head
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.

About

Notifya

Features
Read full description

DETECT - ALERT - PROTECT Notifya is the is the world’s first app that has the ability to reliably detect the opening of a door by using your device’s sensor to monitor the pressure wave that opening a door causes, and can do so even with background noise such as music or TV. Want to know exactly when or how many times your door is opened? Need to know when a customer has came in? Want make sure children aren’t opening doors? Well Notifya can keep a 24 hour ear out for you and alert you each time a door is opened or shut. No more sleepless nights. No more missing a delivery! Not with Notifya. You don’t need any special setup or positioning. Your device can be hidden out of sight, allowing you to monitor your entrance without risking the device being interfered with. FEATURES: - Reliably detect doors opening, even throughout a whole house! - Works on most smartphone models - Alerts are logged with time, date and signal strength - Notifya Pro users can sync multiple devices and receive alerts on remote devices - Simple and easy to use PRIVACY: No audio is permanently recorded or stored anywhere. Period. Notifya analyses audio in real time and no personal information is ever gathered. UPGRADE: If you’d like to remove ads, add other devices, and unlock more features, you can upgrade to Notifya Pro within the app with a simple, one-off purchase.

Screenshots

Cellular Alarm Contact Sensor4 screens
Notifya3 screens

Verdict

The call

The clearest difference is in-app purchases: Cellular Alarm Contact Sensor at none against Notifya's 2. Cellular Alarm Contact Sensor also leads on update cadence (every 3 weeks vs every 30 months) and iOS requirement (13.4 vs 15.6). On price, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Notifya sells 2 one-off in-app purchases. Cellular Alarm Contact Sensor asks for nothing beyond the download.

UpkeepUpdate frequency

Cellular Alarm Contact Sensor ships an update every 3 weeks, Notifya every 30 months. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

Scorecard3 real differences Β· 3 level
Cellular Alarm Contact Sensor versus Notifya: the parameters behind the verdict, then further details
ParameterCellular Alarm Contact SensorNotifya
PriceFreeFree
Update frequencyEvery 3 weeks β€” betterEvery 30 months
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.4 β€” better15.6
Further details β€” not scored
Size2 MB13 MB
Age rating4+4+
DeveloperRobert TaraszkaSUPERSENSE

In-app purchases

None

Cellular Alarm Contact Sensor

No in-app purchases

2 purchases

Notifya

One-time2
  • Notifya Premium$0.99
  • Testing unlock$7.99

Questions

Is Cellular Alarm Contact Sensor free?
Cellular Alarm Contact Sensor is free to download, with no in-app purchases.
Is Notifya free?
Notifya is free to download, with in-app purchases available.
Do Cellular Alarm Contact Sensor or Notifya have ads?
Neither Cellular Alarm Contact Sensor nor Notifya shows ads.
Which is updated more often, Cellular Alarm Contact Sensor or Notifya?
Cellular Alarm Contact Sensor ships an update every 3 weeks, and Notifya every 30 months. Most recently, Cellular Alarm Contact Sensor was updated on October 18, 2026 and Notifya on October 17, 2026.

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