# GREENHOW PRO vs Ultrasonic Pest Shield

The clearest difference is in-app purchases: GREENHOW PRO at none against Ultrasonic Pest Shield's 3. GREENHOW PRO also leads on ads (none vs shown) and device support (3 vs 1). Ultrasonic Pest Shield's advantage is update cadence (fortnightly vs every 5 weeks). On price there is nothing between them.

Both are free to download. Ultrasonic Pest Shield sells 3 in-app purchases, starting at $6.99 per 7 days. GREENHOW PRO asks for nothing beyond the download.

GREENHOW PRO ships an update every 5 weeks, Ultrasonic Pest Shield fortnightly. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | GREENHOW PRO | Ultrasonic Pest Shield |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 71 MB | 89 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [锦才 钟](https://appshunter.io/developer/1433440881) | [Thinking Machine](https://appshunter.io/developer/6790261012) |

## What reviewers say

### GREENHOW PRO

[App page](https://appshunter.io/ios/app/greenhow-pro/id1146358345)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ultrasonic Pest Shield

[App page](https://appshunter.io/ios/app/ultrasonic-pest-shield/id6794275095)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ultrasonic Pest Shield | $6.99 | per 7 days |
| Ultrasonic Pest Shield | $6.99 | per 7 days |
| Ultrasonic Pest Shield | $39.99 | per year |


## Frequently asked questions

### Is GREENHOW PRO free?

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

### Is Ultrasonic Pest Shield free?

Ultrasonic Pest Shield is free to download, with in-app purchases available.

### Do GREENHOW PRO or Ultrasonic Pest Shield have ads?

Ultrasonic Pest Shield shows ads; GREENHOW PRO does not.

### Which is updated more often, GREENHOW PRO or Ultrasonic Pest Shield?

GREENHOW PRO ships an update every 5 weeks, and Ultrasonic Pest Shield fortnightly. Most recently, GREENHOW PRO was updated on November 2, 2026 and Ultrasonic Pest Shield on November 6, 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.*