# Alarmhandler Sensor vs DevPro Light

The clearest difference is in-app purchases: Alarmhandler Sensor at none against DevPro Light's 1. Alarmhandler Sensor also leads on iOS requirement (9.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DevPro Light sells 1 one-off in-app purchase. Alarmhandler Sensor asks for nothing beyond the download.

Alarmhandler Sensor ships an update every 34 months, DevPro Light every 29 months. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Alarmhandler Sensor | DevPro Light |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/alarmhandler-sensor/id1486606462/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 29 months** |
| Monetization | Free | — |
| Size | 7 MB | 10 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Compelling Software](https://appshunter.io/developer/964809111) | [IIC Innovative International Consulting GmbH & Co. KG](https://appshunter.io/developer/1352683483) |

## What reviewers say

### Alarmhandler Sensor

[App page](https://appshunter.io/ios/app/alarmhandler-sensor/id1486606462)

Transform old phones into a cohesive security system. Integrate SMS alarms, IP cameras, and existing devices into one controllable platform. Offers affordable, DIY security solutions.

**Highlights:** Integrates SMS alarm systems, Connects IP cameras, Utilizes old phones as sensors, Unified control via one app, DIY security system

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### DevPro Light

[App page](https://appshunter.io/ios/app/devpro-light-device-security/id1581108628)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DevPro – Pro Version \| Unlock Pro | $1.99 | one-time |


## Frequently asked questions

### Is Alarmhandler Sensor free?

Alarmhandler Sensor is free to download, with no in-app purchases.

### Is DevPro Light free?

DevPro Light is free to download, with in-app purchases available.

### Do Alarmhandler Sensor or DevPro Light have ads?

Neither Alarmhandler Sensor nor DevPro Light shows ads.

### Which is updated more often, Alarmhandler Sensor or DevPro Light?

Alarmhandler Sensor ships an update every 34 months, and DevPro Light every 29 months. Most recently, Alarmhandler Sensor was updated on September 8, 2026 and DevPro Light on September 22, 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.*