# Monotp vs Cellular Alarm Contact Sensor

The clearest difference is update cadence: Cellular Alarm Contact Sensor at every 3 weeks against Monotp's every 11 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.

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

Monotp ships an update every 11 months, Cellular Alarm Contact Sensor every 3 weeks. Both last shipped on November 7, 2026.

## The numbers

| Metric | Monotp | Cellular Alarm Contact Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Size | 270 MB | 2 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MonoFor, Inc.](https://appshunter.io/developer/1496504332) | [Robert Taraszka](https://appshunter.io/developer/1518710123) |

## What reviewers say

### Monotp

[App page](https://appshunter.io/ios/app/monotp/id1496509890)

**Features:** macOS Compatibility

**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 Monotp free?

Monotp 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 Monotp or Cellular Alarm Contact Sensor have ads?

Neither Monotp nor Cellular Alarm Contact Sensor shows ads.

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

Monotp ships an update every 11 months, and Cellular Alarm Contact Sensor every 3 weeks. Most recently, Monotp was updated on November 7, 2026 and Cellular Alarm Contact Sensor on November 7, 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.*