# Alarm 4 home + vs OP

The clearest difference is update cadence: OP at every 2 months against Alarm 4 home +'s every 5 months. Alarm 4 home +'s advantage is device support and iOS requirement (8.0 vs 13.2). On price and in-app purchases there is nothing between them.

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

Alarm 4 home + ships an update every 5 months, OP every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Alarm 4 home + | OP |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 31 MB | 85 MB |
| Requires iOS | **8.0** | 13.2 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038) | [HAIXINDA TRADING LIMITED](https://appshunter.io/developer/1783690523) |

## What reviewers say

### Alarm 4 home +

[App page](https://appshunter.io/ios/app/alarm-4-home-plus/id1282204237)

Control your GSM wireless smart alarm system remotely. Easily arm, disarm, and manage your security system from your iPhone or iPod.

**Highlights:** Remote alarm system control, Arm and disarm functionality, GSM wireless system compatibility, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### OP

[App page](https://appshunter.io/ios/app/op-link/id6739100995)

**In-app purchases:** none


## Frequently asked questions

### Is Alarm 4 home + free?

Alarm 4 home + is free to download, with no in-app purchases.

### Is OP free?

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

### Which is updated more often, Alarm 4 home + or OP?

Alarm 4 home + ships an update every 5 months, and OP every 2 months. Most recently, Alarm 4 home + was updated on November 3, 2026 and OP on October 30, 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.*