# CampusGuard911 vs 3.14 Master Pi

The clearest difference is in-app purchases: CampusGuard911 at none against 3.14 Master Pi's 5. CampusGuard911 also leads on iOS requirement (12.0 vs 15.1). 3.14 Master Pi's advantage is update cadence (every 2 months vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. 3.14 Master Pi sells 5 one-off in-app purchases. CampusGuard911 asks for nothing beyond the download.

CampusGuard911 ships an update every 6 months, 3.14 Master Pi every 2 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | CampusGuard911 | 3.14 Master Pi |
| --- | --- | --- |
| 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 | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 58 MB | 47 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guard911, LLC](https://appshunter.io/developer/862725594) | [David Brown](https://appshunter.io/developer/1848509879) |

## 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


### 3.14 Master Pi

[App page](https://appshunter.io/ios/app/314-master-pi/id6754499094)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summation Supporter | $2.99 | one-time |
| Premium (Lifetime) | $4.99 | one-time |
| Radical Patron | $9.99 | one-time |
| Infinite Supporter | $29.99 | one-time |
| Pi Master | $99.99 | one-time |


## Frequently asked questions

### Is CampusGuard911 free?

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

### Is 3.14 Master Pi free?

3.14 Master Pi is free to download, with in-app purchases available.

### Do CampusGuard911 or 3.14 Master Pi have ads?

Neither CampusGuard911 nor 3.14 Master Pi shows ads.

### Which is updated more often, CampusGuard911 or 3.14 Master Pi?

CampusGuard911 ships an update every 6 months, and 3.14 Master Pi every 2 months. Most recently, CampusGuard911 was updated on October 24, 2026 and 3.14 Master Pi on October 10, 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.*