Comparison

CampusGuard911 vs Calculus Solver

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CampusGuard911

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
Read full description

CampusGuard911 is a mobile panic button app for university and college faculty and staff. In the event of an active campus shooting emergency, a faculty or staff member presses the main CampusGuard911 panic button. As the app is dialing 911, an alert is immediately sent to the smartphones of all federal, state and local, ON and OFF duty, law enforcement officers who are in close proximity to the school and who belong to the Hero911 Network. Additionally, an intra-campus alert is simultaneously sent to the smartphones of all faculty and staff and a mapped location of the initial alert is displayed (mapping depends on cell coverage). CampusGuard911 also alerts all other protected locations within a 5 mile radius of the initial alert. CampusGuard911 is also listed in the AT&T FirsNet App Catalog as an emergency app for first responders. Please be aware that continued use of GPS running in the background can dramatically decrease battery life.

About

Calculus Solver

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
Read full description

Easily solve any calculus problem ASAP with CalcAI, a step-by-step calculus solver app! Got a tricky calculus question? Need instant step-by-step explanations? CalcAI is here to assist you. We've got you covered for any calculus problem you need to solve. Just upload or take a photo of your calculus problems, and CalcAI will instantly recognize the problem and help you solve it with a thorough explanation. **KEY FEATURES** - Upload or take a photo of a handwritten or digital calculus problem. - Copy and share the detailed solutions. - Topics cover all aspects of calculus, from basic derivatives to advanced integrals and multivariable calculus. - Solutions are provided with detailed steps. - We provide a free trial to test out the app. A subscription is required to access the app. By using CalcAI, you accept our Terms of Use and Privacy Policy. Terms of use: https://renaissanceapps.com/terms-conditions Privacy Policy: https://renaissanceapps.com/privacy-policy

Screenshots

CampusGuard9114 screens
Calculus Solver4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
CampusGuard911 versus Calculus Solver: the parameters behind the verdict, then further details
ParameterCampusGuard911Calculus Solver
PriceFreeFree
Rating5.0 (4 ratings) — better4.2 (5 ratings)
Positive reviews—50.0% of reviews
Number of ratings45 — better
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size58 MB23 MB
Age rating4+4+
DeveloperGuard911, LLCRenaissance Apps LLC

Customer experience

CampusGuard911

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Calculus Solver

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

CampusGuard911

No in-app purchases

2 purchases

Calculus Solver

Subscriptions2
  • Calculus Answers: Weekly Sub3 Days trial$5.997 Days
  • Calculus Answers: Weekly Sub$34.991 Year

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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