# CampusGuard911 vs Calculus Solver

The clearest difference is rating: CampusGuard911 at 5.0 against Calculus Solver's 4.2. CampusGuard911 also leads on in-app purchases (none vs 2) and iOS requirement (12.0 vs 16.0). Calculus Solver's advantage is update cadence (every 2 months vs every 6 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Calculus Solver sells 2 in-app purchases, starting at $5.99 per 7 days. CampusGuard911 asks for nothing beyond the download.

CampusGuard911 holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 4 and 5 respectively.

CampusGuard911 ships an update every 6 months, Calculus Solver every 2 months. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | CampusGuard911 | Calculus Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/campusguard911/id972097916/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/calculus-solver-math-helper/id6738013581/reviews) |
| Number of ratings | 4 | **5** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | **Free** | Subscription |
| Size | 58 MB | 23 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guard911, LLC](https://appshunter.io/developer/862725594) | [Renaissance Apps LLC](https://appshunter.io/developer/1220536592) |

## 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


### Calculus Solver

[App page](https://appshunter.io/ios/app/calculus-solver-math-helper/id6738013581)

Instantly solve calculus problems with AI-powered step-by-step explanations. Upload or photograph your math questions and receive detailed solutions covering derivatives, integrals, and more. A free trial is available before subscribing.

**Highlights:** AI-powered problem solving, Photo recognition for problems, Detailed step-by-step solutions, Covers derivatives and integrals, Copy and share solutions, Free trial available

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculus Answers: Weekly Sub | $5.99 | per 7 days |
| Calculus Answers: Weekly Sub | $34.99 | per year |


## Frequently asked questions

### Is CampusGuard911 free?

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

### Is Calculus Solver free?

Calculus Solver is free to download, with in-app purchases available.

### Which has better reviews, CampusGuard911 or Calculus Solver?

CampusGuard911 is rated higher. CampusGuard911 averages 5.0 out of 5 from 4 ratings, while Calculus Solver averages 4.2 from 5 ratings.

### Do CampusGuard911 or Calculus Solver have ads?

Neither CampusGuard911 nor Calculus Solver shows ads.

### Which is updated more often, CampusGuard911 or Calculus Solver?

CampusGuard911 ships an update every 6 months, and Calculus Solver every 2 months. Most recently, CampusGuard911 was updated on October 1, 2026 and Calculus Solver on September 30, 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.*