# Shepherd Shield vs Vox Petri

The clearest difference is in-app purchases: Vox Petri at none against Shepherd Shield's 2. Vox Petri also leads on update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Shepherd Shield sells 2 one-off in-app purchases. Vox Petri asks for nothing beyond the download.

Shepherd Shield ships an update every 2 months, Vox Petri every 2 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Shepherd Shield | Vox Petri |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (24 ratings)](https://appshunter.io/ios/app/shepherd-shield/id1230505120/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 108 MB | 85 MB |
| Requires iOS | **16** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Security Services Northwest, Inc.](https://appshunter.io/developer/1230505119) | [Jonathan Liang](https://appshunter.io/developer/1875641115) |

## What reviewers say

### Shepherd Shield

[App page](https://appshunter.io/ios/app/shepherd-shield/id1230505120)

This app provides real-time threat assessments based on location, using a color-coded alert system. Users can customize alerts for various threats and receive notifications for pre-set safety spots. It includes emergency contact buttons for 911 and a dispatch center.

**Highlights:** Real-time threat assessment, Color-coded alert index, Customizable alert categories, Map-based data view, Pre-set safety spot notifications, SOS and Call 911 buttons

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Subscription | $5.00 | one-time |
| One Year Subscription | $29.95 | one-time |


### Vox Petri

[App page](https://appshunter.io/ios/app/vox-petri/id6773098988)

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

**In-app purchases:** none


## Frequently asked questions

### Is Shepherd Shield free?

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

### Is Vox Petri free?

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

### Do Shepherd Shield or Vox Petri have ads?

Neither Shepherd Shield nor Vox Petri shows ads.

### Which is updated more often, Shepherd Shield or Vox Petri?

Shepherd Shield ships an update every 2 months, and Vox Petri every 2 weeks. Most recently, Shepherd Shield was updated on November 2, 2026 and Vox Petri on October 31, 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.*