Cortex Onboard 4+

Cortex on your mobile device

Vesper Marine

    • 3.9 • 7 Ratings
    • Free



Cortex Onboard is free with your Cortex. Use it to configure your Cortex Hub and download updates to your Cortex devices with new features and improvements. You can also use Cortex Onboard to receive and manage alerts, view AIS information and instrument data anywhere on board your boat. View out-of-the-box sensors or NMEA 2000 networked instruments.

- Setup is easy and free.
- Use Cortex Onboard to configure and update your Cortex devices easily.
- View AIS information and receive alerts on board direct to your device.
- Manage Anchor Watch from the palm of your hand anywhere on board.
- Use the Cortex Hub’s built-in sensors for battery level, barometric pressure and boat position.
- Connect your Cortex Hub to NMEA 2000, or an external sensor, to add monitoring for wind, depth, bilge high water, temperature, shore power or security.
- The Cortex Hub supports up to 10 WiFi devices (includes Handsets).

What’s New

Version 1.15.1

Garmin is constantly working to improve Cortex and strives to make your boating a safer and more enjoyable experience. This version has a number of improvements to the Cortex Onboard app experience and includes Cortex Software update 2.1.32 (containing Hub version 2.1.2883 and Handset version 2.1.18).

Detailed release notes can be found on

Ratings and Reviews

3.9 out of 5
7 Ratings

7 Ratings

WakingDude ,

Vesper is the Best

IMO Vesper is the best marine hardware and software company out there. Everything they do exudes quality, care, and thoughtful consideration. Cortex is no exception, and is a central and critical piece of safety equipment aboard my sailboat. Vesper support is excellent, they’ve been very receptive and responsive to suggestions, and continually rolling out improvements. I do hope all of these positive qualities continue following the Garmin acquisition.

Ctrjtic that is with a J ,

Beautiful interface

Great tool to use with the Cortex onboard the boat. The Anchor Watch is the best on the market!

66Replica ,

Buggy and disappointing

The idea of the Cortex is fantastic but the execution leaves much to be desired. I’m in tech and have spent more than a day trying to get this to function correctly. It seems to be both an issue with the WiFi hardware (weak signal even standing next to it) and the software. State management seems to be an issue and the WiFi networking will make you tear your hair out. And good luck trying to use the boat network. This needs lots more investment from Garmin to justify the price and make it a recommended buy. For now, skip it.

Developer Response ,

Try checking you have enabled the M1 to use the external WiFi antenna (assuming that you have one connected).
Go to Settings->WiFi and make sure that the External Antenna switch is on.

App Privacy

The developer, Vesper Marine, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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