Comparison

Catapult EMS vs AirSync Sender

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

Head to head
About

Catapult EMS

Stay informed during emergencies with audible alerts that bypass silent mode. This app provides quick access to emergency procedures, allows for secure login via biometrics, and integrates with a comprehensive emergency management system for organizations.

Highlights
  • Audible emergency alerts on silent mode
  • Quick home screen access
  • Touch/Face ID login
  • Location and status gathering
  • One-on-one emergency conversations
  • Alert districts, police, and fire
  • View emergency procedures
  • Anonymous threat reporting
Features
Read full description

Never miss another emergency alert: The CatapultEMS app plays audible emergency alerts even when your phone is on silent. It works with WiFi or cell data. Quick and easy: Add the icon to your home screen so you have quick access in an emergency. No more passwords: Set up touch or face id, so you don’t have to worry about usernames, passwords and extra button presses. --- This app works with CatapultEMS, a complete emergency management system for organizations and schools. Staff and student safety is our prime concern. Use CatapultEMS to • Gather locations of students, staff, and their statuses in an emergency. • Have one-on-one emergency conversations. • Alert districts, police, and fire. • View up-to-date emergency procedures. • Receive anonymous reports of threats. If your organization does not use CatapultEMS, contact sales@catapultems.com for a quote.

About

AirSync Sender

Wirelessly share your device's screen to compatible interactive displays or multiple iOS devices. Facilitates efficient multi-person communication and collaboration through features like split screen and annotation.

Highlights
  • WebRTC screen sharing
  • QR code sharing
  • Split screen support
  • Moderator mode
  • Remote control
  • Annotation
  • Screen mirroring
Read full description

AirSync Sender is a screen sharing app specially designed for AirSync. With AirSync Sender, you can easily share your screen to AirSync devices, such as the ViewSonic ViewBoard interactive flat panel. Whether connected through the Internet or a local area network, you can use AirSync Sender to share your ideas wirelessly and create a more efficient multi-person communication environment. You can also share AirSync device screen to multiple iOS devices through AirSync sender. The main functions of AirSync Sender include: 1. Screen sharing based on WebRTC technology 2. Sharing screen through QR code 3. Split screen to support multiple sharing screens 4. Support moderator mode 5. Receive device side screen and remote control 6. Annotation 7. Screen mirroring Quick screen sharing guide: 1. Launch the AirSync application on the receiving side 2. Launch the AirSync Sender 3. Enter the display code and one-time password 4. After pressing "Next", and click "Start broadcast" System requirements: 1. iOS 11 or above 2. LAN or WAN connection required

Screenshots

Catapult EMS4 screens
AirSync Sender4 screens

Verdict

The call

The clearest difference is rating: Catapult EMS at 2.6 against AirSync Sender's 1.8. AirSync Sender's advantage is review sentiment (50% vs 30%) and update cadence (monthly vs every 3 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Catapult EMS holds the better App Store score, 2.6 against 1.8. Both are backed by a comparable volume of ratings — 12 and 5 respectively. Written reviews complicate that: 30% of Catapult EMS's written reviews are positive against 50% of AirSync Sender's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Catapult EMS ships an update every 3 months, AirSync Sender monthly. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

Scorecard4 real differences · 6 level
Catapult EMS versus AirSync Sender: the parameters behind the verdict, then further details
ParameterCatapult EMSAirSync Sender
PriceFreeFree
Rating2.6 (12 ratings) — better1.8 (5 ratings)
Positive reviews30.0% of reviews50.0% of reviews — better
Number of ratings12 — better5
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.113.0 — better
Further details — not scored
Size35 MB82 MB
Age rating4+4+
DeveloperDiverse Network Associates IncorporatedViewSonic_International

Customer experience

Catapult EMS

All ratings12 ratings
Positive41.7%
Neutral0.0%
Negative58.3%
Written reviews10 reviews
Positive30.0%
Neutral0.0%
Negative70.0%

AirSync Sender

All ratings5 ratings
Positive20.0%
Neutral0.0%
Negative80.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Catapult EMS

No in-app purchases

None

AirSync Sender

No in-app purchases

Questions

Is Catapult EMS free?
Catapult EMS is free to download, with no in-app purchases.
Is AirSync Sender free?
AirSync Sender is free to download, with no in-app purchases.
Which has better reviews, Catapult EMS or AirSync Sender?
Catapult EMS is rated higher. Catapult EMS averages 2.6 out of 5 from 12 ratings, while AirSync Sender averages 1.8 from 5 ratings.
Do Catapult EMS or AirSync Sender have ads?
Neither Catapult EMS nor AirSync Sender shows ads.
Which is updated more often, Catapult EMS or AirSync Sender?
Catapult EMS ships an update every 3 months, and AirSync Sender monthly. Most recently, Catapult EMS was updated on September 10, 2026 and AirSync Sender on September 17, 2026.

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