Comparison

Class Controller vs Mustr

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

Head to head
About

Class Controller

Features
Read full description

Class Controller is the ultimate safety platform built for schools, empowering staff, administrators, and security teams to respond instantly and effectively during any emergency. Whether it's a medical issue, a threat on campus, or a routine drill, Class Controller ensures everyone is informed, connected, and ready to actβ€”within seconds. Key Features: Instant Emergency Alerts: With one tap, notify all designated responders including principals, security, counselors, and nurses. Live Video, Audio, and GPS: Share your real-time situation instantly so help arrives faster and better prepared. Responder Engagement Tracking: See who is responding and monitor coordination from the Command Center. Secure Cloud Storage: All alert history, media, and location data are safely stored for future reference and training. Chain of Custody Control: Keep track of student hand-offs during evacuations or pickups. Personalized Alert Groups: Customize who receives alerts to fit your school’s emergency protocols. End Alerts Securely: Only the user's personal PIN code can deactivate an alert. Class Controller is more than just an appβ€”it’s a complete school safety system designed to save lives, reduce liability, and improve emergency readiness.

About

Mustr

Features
Read full description

Mustr is the K-12 emergency communications platform built on the I Love You Guys Foundation's Standard Response Protocol (SRP) and Standard Reunification Method (SRM). It puts the same five protocol triggers β€” HOLD, SECURE, LOCKDOWN, EVACUATE, SHELTER, plus ALL CLEAR β€” that your district already trains on into every staff member's pocket, with the safety rails a real K-12 deployment needs. WHAT MUSTR DOES β€’ SRP-native triggers, not generic alerts. The exact protocol your staff trains on, with a 3-second press-and-hold gate so a real LOCKDOWN can't be triggered by an accidental tap. Drills are a regular tap and are unambiguously labeled. β€’ Realtime + push + SMS, in parallel. Server-Sent Events drive the live admin and mobile UI in roughly 125ms. Expo Push wakes phones in pockets. Twilio SMS catches stale tokens. Idempotent dispatcher with retry ladder + dead-letter queue. β€’ "I'm safe" check-ins per staff member, per event. The Command tab shows live counts of who has and hasn't checked in, by school and by zone, so the Incident Commander knows immediately who needs to be located. β€’ Standard Reunification Method on a tablet. Encrypted guardian list, government-ID verification, photo capture for chain of custody, append-only release ledger that Postgres triggers refuse to UPDATE or DELETE. β€’ Nine NIMS-aligned ICS roles adapted for K-12 β€” Incident Commander, PIO, Liaison, Safety Officer, Operations, Planning, Logistics, Finance/Admin, Reunification Coordinator. Reassign with one tap; every assignment is timestamped. β€’ Complete incident export. Every trigger, attendance report, zone report, ICS assignment, staff check-in, and message is timestamped and downloadable as a PDF the moment the event closes. β€’ Live SIS sync β€” PowerSchool, Infinite Campus, FACTS β€” with a Postgres-backed sync queue, conflict resolution, empty-response safeguards, and 3-strike alerting so a SIS outage doesn't quietly stale your roster. PRIVACY & COMPLIANCE β€’ FERPA-aligned by design. Mustr operates as a school official with a legitimate educational interest under 34 CFR Β§99.31(a)(1)(i)(B). β€’ Per-district AES-GCM encryption seals guardian PII at rest. β€’ Tenant isolation top to bottom β€” cross-tenant IDs return 404 to prevent enumeration. β€’ 5-role RBAC re-enforced on the server inside every state-changing call. β€’ Right of access (FERPA export) and right to be forgotten with a 24-hour cancel window. SAFETY DISCLAIMER Mustr is NOT a 911 replacement. In any real emergency, call 911 first. Mustr coordinates the response that follows. The app shows a mandatory "call 911 first" acknowledgement on first launch. WHO MUSTR IS FOR Mustr is intended exclusively for K-12 district staff (administrators, teachers, safety teams, reunification coordinators). Each district provisions its own users; there is no public sign-up. LEARN MORE mustrk12.com β€” privacy policy, terms of service, request-pilot form, and account deletion form.

Screenshots

Class Controller3 screens
Mustr4 screens

Verdict

The call

The clearest difference is update cadence: Class Controller at every 9 days against Mustr's every 3 weeks. Class Controller also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Class Controller ships an update every 9 days, Mustr every 3 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard2 real differences Β· 4 level
Class Controller versus Mustr: the parameters behind the verdict, then further details
ParameterClass ControllerMustr
PriceFreeFree
Update frequencyEvery 9 days β€” betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS13.0 β€” better15.1
Further details β€” not scored
Size127 MB46 MB
Age rating17+4+
DeveloperDash Safety LLCDominic Iocco

In-app purchases

None

Class Controller

No in-app purchases

None

Mustr

No in-app purchases

Questions

Is Class Controller free?
Class Controller is free to download, with no in-app purchases.
Is Mustr free?
Mustr is free to download, with no in-app purchases.
Do Class Controller or Mustr have ads?
Neither Class Controller nor Mustr shows ads.
Which is updated more often, Class Controller or Mustr?
Class Controller ships an update every 9 days, and Mustr every 3 weeks. Most recently, Class Controller was updated on November 8, 2026 and Mustr on November 5, 2026.

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