# W20 vs SmartAlarmsPro

The clearest difference is iOS requirement: W20 at 8.0 against SmartAlarmsPro's 15. On price, update cadence, ads 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.

W20 ships an update every 4 weeks, SmartAlarmsPro fortnightly. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | W20 | SmartAlarmsPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/w20/id1319762118/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 3.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 58 MB | 199 MB |
| Requires iOS | **8.0** | 15 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [传林 方](https://appshunter.io/developer/699727053) | [瑞发 李](https://appshunter.io/developer/963471546) |

## What reviewers say

### W20

[App page](https://appshunter.io/ios/app/w20/id1319762118)

Control your alarm system remotely via phone calls, SMS, or a dedicated app. Receive instant notifications on your phone in case of emergencies, and integrate various accessories like door sensors and infrared detectors.

**Highlights:** Multi-function alarm system, Remote control via phone call, Remote control via SMS, App-based control, Emergency notifications, Accessory integration (door sensors, infrared)

**Features:** macOS Compatibility

**In-app purchases:** none


### SmartAlarmsPro

[App page](https://appshunter.io/ios/app/smartalarmspro/id6476841253)

**In-app purchases:** none


## Frequently asked questions

### Is W20 free?

W20 is free to download, with no in-app purchases.

### Is SmartAlarmsPro free?

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

### Do W20 or SmartAlarmsPro have ads?

Neither W20 nor SmartAlarmsPro shows ads.

### Which is updated more often, W20 or SmartAlarmsPro?

W20 ships an update every 4 weeks, and SmartAlarmsPro fortnightly. Most recently, W20 was updated on November 6, 2026 and SmartAlarmsPro on November 8, 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.*