# Catapult EMS vs AirSync Sender

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.

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

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.

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.

## The numbers

| Metric | Catapult EMS | AirSync Sender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (12 ratings)](https://appshunter.io/ios/app/catapult-ems/id1449934271/reviews)** | [1.8 (5 ratings)](https://appshunter.io/ios/app/airsync-sender/id6453759985/reviews) |
| Number of ratings | **12** | 5 |
| Positive reviews | 30.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 35 MB | 82 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Diverse Network Associates Incorporated](https://appshunter.io/developer/1449934270) | [ViewSonic_International](https://appshunter.io/developer/871648106) |

## What reviewers say

### Catapult EMS

[App page](https://appshunter.io/ios/app/catapult-ems/id1449934271)

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:** macOS Compatibility

**In-app purchases:** none


### AirSync Sender

[App page](https://appshunter.io/ios/app/airsync-sender/id6453759985)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*