# Cellular Alarm Contact Sensor vs Notifya

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.

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

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.

## The numbers

| Metric | Cellular Alarm Contact Sensor | Notifya |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 30 months |
| Size | 2 MB | 13 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Robert Taraszka](https://appshunter.io/developer/1518710123) | [SUPERSENSE](https://appshunter.io/developer/1610370296) |

## 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


### Notifya

[App page](https://appshunter.io/ios/app/notifya/id1610370294)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notifya Premium | $0.99 | one-time |
| Testing unlock | $7.99 | one-time |


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