# CampusGuard911 vs π Pi Challenge

The clearest difference is in-app purchases: CampusGuard911 at none against π Pi Challenge's 1. CampusGuard911 also leads on ads (none vs shown). π Pi Challenge's advantage is update cadence (every 2 months vs every 6 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. π Pi Challenge sells 1 in-app purchase, starting at $0.99 per month. CampusGuard911 asks for nothing beyond the download.

CampusGuard911 ships an update every 6 months, π Pi Challenge every 2 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | CampusGuard911 | π Pi Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/campusguard911/id972097916/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 58 MB | 73 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guard911, LLC](https://appshunter.io/developer/862725594) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### CampusGuard911

[App page](https://appshunter.io/ios/app/campusguard911/id972097916)

This safety app provides a direct panic button for university faculty and staff during emergencies. It alerts local law enforcement and campus personnel, displaying the location of the incident. The app also notifies nearby protected locations.

**Highlights:** Mobile panic button, Alerts law enforcement, Campus-wide alerts, Location mapping, Notifies nearby locations, AT&T FirstNet listed

**In-app purchases:** none


### π Pi Challenge

[App page](https://appshunter.io/ios/app/pi-challenge/id6756227034)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is CampusGuard911 free?

CampusGuard911 is free to download, with no in-app purchases.

### Is π Pi Challenge free?

π Pi Challenge is free to download, with in-app purchases available.

### Do CampusGuard911 or π Pi Challenge have ads?

π Pi Challenge shows ads; CampusGuard911 does not.

### Which is updated more often, CampusGuard911 or π Pi Challenge?

CampusGuard911 ships an update every 6 months, and π Pi Challenge every 2 months. Most recently, CampusGuard911 was updated on October 24, 2026 and π Pi Challenge on October 5, 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.*