Comparison

Iridium GO! vs AirmarCAST™

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

Head to head
About

Iridium GO!

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
Read full description

Iridium GO! enables satellite connectivity for your iPhone/iPad where terrestrial networks are non-existent, unreliable, or costly. With Iridium GO! and the power of the Iridium global satellite network, your iPhone/iPad will now work anywhere on the planet. The Iridium GO! app enables users to connect over Wi-Fi and make phone calls, send SMS, post Twitter updates, or activate SOS in the event of an emergency (requires registration). Visit www.iridiumgo.com for Iridium GO! product details and information on where to buy. The Iridium GO! app supports English, Spanish, French, Russian, and Japanese languages. Note: The Iridium GO! device is required to use this app.

About

AirmarCAST™

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
Read full description

Airmar® CAST™ connects to the Bluetooth®-enabled DST810, DX900+, WX300 multisensors and SmartBoat® modules on your boat, making sensor configuration and calibration easy with intuitive app navigation and real-time data from your multisensor. View data on detailed gauges and digital data screens, and perform speed, temperature, and attitude calibrations without the need for additional converters or cables. With CAST, you can configure your multisensor directly, regardless of the other displays and gauges on board. All data configurations and calibrations are stored in the multisensor and delivered on the NMEA2000® network. When used with DST810, you can calibrate basic or heel-compensated speed through water using your on-board GPS speed for comparison. Intuitive wizards guide you through multiple runs to correct for current. Or take it a step further to advanced speed calibration, with up to five heel angles and ten reference speeds. Until now, advanced speed calibration was only possible through expensive PC based software. With Airmar’s SmartBoat® modules, the CAST app delivers the fastest connection to the SmartView software for system configuration.

Screenshots

Iridium GO!4 screens
AirmarCAST™4 screens

Verdict

The call

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.

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

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Iridium GO! versus AirmarCAST™: the parameters behind the verdict, then further details
ParameterIridium GO!AirmarCAST™
PriceFreeFree
Rating1.9 (58 ratings)2.6 (5 ratings) — better
Positive reviews6.8% of reviews25.0% of reviews — better
Number of ratings58 — better5
Update frequencyEvery 5 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better16
Further details — not scored
Size67 MB112 MB
Age rating4+4+
DeveloperIridiumAirmar Technology Inc.

Customer experience

Iridium GO!

All ratings54 ratings
Positive20.4%
Neutral1.9%
Negative77.8%
Written reviews74 reviews
Positive6.8%
Neutral6.8%
Negative86.5%

AirmarCAST™

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

None

Iridium GO!

No in-app purchases

None

AirmarCAST™

No in-app purchases

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.

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