# Iridium GO! vs AirmarCAST™

The clearest difference is rating: AirmarCAST™ at 2.6 against Iridium GO!'s 1.9. AirmarCAST™ also leads on review sentiment (25% vs 7%) and update cadence (every 3 months vs every 5 months). Iridium GO!'s advantage is ratings volume (58 vs 5) and iOS requirement (14.0 vs 16). On price, ads, in-app purchases and monetization model there is nothing between them.

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

AirmarCAST™ holds the better App Store score, 2.6 against 1.9. That said, the two scores are not equally well evidenced: Iridium GO! has 58 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 7% of Iridium GO!'s written reviews are positive against 25% of AirmarCAST™'s.

Iridium GO! ships an update every 5 months, AirmarCAST™ every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Iridium GO! | AirmarCAST™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (58 ratings)](https://appshunter.io/ios/app/iridium-go/id808207315/reviews) | **[2.6 (5 ratings)](https://appshunter.io/ios/app/airmarcast/id1492428585/reviews)** |
| Number of ratings | **58** | 5 |
| Positive reviews | 6.8% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 67 MB | 112 MB |
| Requires iOS | **14.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Iridium](https://appshunter.io/developer/634954979) | [Airmar Technology Inc.](https://appshunter.io/developer/1062316789) |

## What reviewers say

### Iridium GO!

[App page](https://appshunter.io/ios/app/iridium-go/id808207315)

Connect your iPhone or iPad to a global satellite network for calls, texts, and social media updates anywhere on Earth. This app provides essential communication capabilities even in areas without terrestrial network coverage, including emergency SOS functionality.

**Highlights:** Satellite calling, SMS messaging, Twitter integration, Emergency SOS activation, Global network coverage, Wi-Fi connectivity

**In-app purchases:** none


### AirmarCAST™

[App page](https://appshunter.io/ios/app/airmarcast/id1492428585)

Configure and calibrate your boat's Bluetooth-enabled multisensors and modules directly from your mobile device. View real-time data on detailed gauges and perform advanced calibrations for speed, temperature, and attitude without extra hardware.

**Highlights:** Bluetooth sensor connection, Real-time data display, Intuitive navigation, Speed, temperature, attitude calibration, On-board GPS speed comparison, Advanced speed calibration wizards

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Iridium GO! free?

Iridium GO! is free to download, with no in-app purchases.

### Is AirmarCAST™ free?

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

### Which has better reviews, Iridium GO! or AirmarCAST™?

AirmarCAST™ is rated higher. Iridium GO! averages 1.9 out of 5 from 58 ratings, while AirmarCAST™ averages 2.6 from 5 ratings.

### Do Iridium GO! or AirmarCAST™ have ads?

Neither Iridium GO! nor AirmarCAST™ shows ads.

### Which is updated more often, Iridium GO! or AirmarCAST™?

Iridium GO! ships an update every 5 months, and AirmarCAST™ every 3 months. Most recently, Iridium GO! was updated on November 1, 2026 and AirmarCAST™ on November 3, 2026.

---

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