# Crow Pro Alarm vs ScanPDF+

The clearest difference is update cadence: ScanPDF+ at every 9 days against Crow Pro Alarm's every 3 weeks. ScanPDF+ also leads on iOS requirement (13.0 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.

Crow Pro Alarm ships an update every 3 weeks, ScanPDF+ every 9 days. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Crow Pro Alarm | ScanPDF+ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 23.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 103 MB | 45 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Crow electronic engineering Ltd.](https://appshunter.io/developer/849121338) | [Hainan Yidaosan Technology Co., Ltd.](https://appshunter.io/developer/1764421732) |

## What reviewers say

### Crow Pro Alarm

[App page](https://appshunter.io/ios/app/crow-pro-alarm/id1031916344)

Monitor and control your home security system remotely. Manage panel states, view events and alarms, operate outputs and zones, and access live or stored camera feeds. Easily switch between multiple linked security panels.

**Highlights:** Control panel state (Arm, Disarm), View latest events and alarms, Operate active outputs, Manage zones (Activate/Deactivate Bypass), Take and view camera pictures, Access panel and user information, Switch between linked panels

**Features:** Vision Pro support

**In-app purchases:** none


### ScanPDF+

[App page](https://appshunter.io/ios/app/scanpdf-plus/id6761295524)

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

**In-app purchases:** none


## Frequently asked questions

### Is Crow Pro Alarm free?

Crow Pro Alarm is free to download, with no in-app purchases.

### Is ScanPDF+ free?

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

### Do Crow Pro Alarm or ScanPDF+ have ads?

Neither Crow Pro Alarm nor ScanPDF+ shows ads.

### Which is updated more often, Crow Pro Alarm or ScanPDF+?

Crow Pro Alarm ships an update every 3 weeks, and ScanPDF+ every 9 days. Most recently, Crow Pro Alarm was updated on October 17, 2026 and ScanPDF+ on October 25, 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.*