# HWM PRISM vs Alarmhandler Sensor

The clearest difference is update cadence: HWM PRISM at every 8 months against Alarmhandler Sensor's every 34 months. 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.

HWM PRISM ships an update every 8 months, Alarmhandler Sensor every 34 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HWM PRISM | Alarmhandler Sensor |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 34 months |
| Monetization | — | Free |
| Size | 38 MB | 7 MB |
| Requires iOS | 10.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HWM-Water Ltd](https://appshunter.io/developer/1250353559) | [Compelling Software](https://appshunter.io/developer/964809111) |

## What reviewers say

### HWM PRISM

[App page](https://appshunter.io/ios/app/hwm-prism/id1410739412)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HWM PRISM free?

HWM PRISM is free to download, with no in-app purchases.

### Is Alarmhandler Sensor free?

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

### Do HWM PRISM or Alarmhandler Sensor have ads?

Neither HWM PRISM nor Alarmhandler Sensor shows ads.

### Which is updated more often, HWM PRISM or Alarmhandler Sensor?

HWM PRISM ships an update every 8 months, and Alarmhandler Sensor every 34 months. Most recently, HWM PRISM was updated on October 19, 2026 and Alarmhandler Sensor on October 24, 2026.

---

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