AirmarCAST™ vs Simarine Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Bluetooth sensor connection
- Real-time data display
- Intuitive navigation
- Speed, temperature, attitude calibration
- On-board GPS speed comparison
- Advanced speed calibration wizards
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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.
Simarine Connect
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Keep a close eye on your levels with Simarine Connect, the dedicated companion app for Simarine Bluetooth-enabled tank sensors. Designed for simplicity and reliability, this app turns your smartphone into a digital gauge for your boat, camper, or caravan. Current Features: • Real-time level tracking for fresh water, grey water, black water, and fuel. • Wireless convenience via Bluetooth Low Energy (BLE). • Intuitive visuals for easy-to-read percentages and volume. • Multi-sensor support to manage multiple tanks in one app. Simple. Reliable. Smart. Simarine Connect is built for users who need a straightforward way to manage their tanks. By leveraging precise sensor data and a clean interface, you can plan your trips with confidence.
Screenshots
Verdict
The clearest difference is update cadence: Simarine Connect at fortnightly against AirmarCAST™'s every 3 months. Simarine Connect also leads on iOS requirement (12.2 vs 16). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AirmarCAST™ ships an update every 3 months, Simarine Connect fortnightly. The most recent releases landed on September 8, 2026 and September 13, 2026 respectively.
| Parameter | AirmarCAST™ | Simarine Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (5 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 16 | 12.2 — better |
| Further details — not scored | ||
| Size | 112 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | Airmar Technology Inc. | SIMARINE |
In-app purchases
AirmarCAST™
No in-app purchases
Simarine Connect
No in-app purchases







