Comparison

NMEAremote vs Cortex Onboard

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

Head to head
About

NMEAremote

This app provides real-time marine data from your ship's navigation system directly to your mobile device. Monitor navigation, wind, and depth information at a glance for enhanced safety and performance on the water.

Highlights
  • Real-time marine data display
  • Supports NMEA 0183, NMEA 2000, SignalK
  • Customizable dashboard
  • Alarms and logging
  • Apple Watch integration
  • Server/Repeater functionality
Features
Read full description

Your boat's instruments, right in your hand. NMEAremote connects your iPhone, iPad, or Apple Watch to your vessel's network and navigation system and brings all critical marine data to a bold, easy-to-read dashboard — wherever you are on deck. Whether you're racing offshore or cruising coastal waters, NMEAremote delivers real-time wind, speed, depth, GPS, AIS, engine data, and more in a single, fully customizable display. The first NMEA app ever on the App Store, now a trusted Swiss Army knife for sailors worldwide. Broad Compatibility Supports NMEA 0183, NMEA 2000, Signal K, and MQTT from virtually any device. Compatible with Expedition, B&G H5000, A&T, and a wide range of preconfigured sources including Actisense, Digital Yacht, Yacht Devices, B&G, and many more — over WiFi or Bluetooth. Your Data, Your Way All values are organized into intuitive Modules — AIS, GPS, Wind, Navigation, Sounder, Heading, Environment, Performance, Racing, Engine, and more. Customizable Dashboards Create personalized displays tailored to your needs. Focus on the data that matters most to you. Build the dashboard you need: choose layouts, add pages, set favorites or just use the comprehensive default dashboard. Every numeric value can be individually smoothed for clean, stable readings. Set a custom color for each instrument title and value — match your cockpit aesthetics, improve readability in sunlight or at night, or color-code data by category at a glance. Your dashboard, your palette. Built for iPad — Side by Side with Your Charts NMEAremote supports iPad Split View, so you can run your favourite charting app on one side while NMEAremote displays clean, live instrument values on the other. No more switching back and forth. Your chart and your data, together on one screen. User-Friendly Interface Clean, intuitive design makes it easy for both experienced sailors and beginners to navigate. Performance Sailing Import your polar diagram and unlock full performance analytics — Polar Speed, Target Speed, VMG, Beat & Gybe angles, and more. Ideal for racers who want that extra tenth of a knot. Stay Aware Configurable alarms alert you visually and audibly when any value crosses a threshold. Keep a full NMEA log for review and diagnostics. Forward data to other devices with the built-in server/repeater. On Your Wrist & Glasses Native Apple Watch app runs independently from your iPhone. Supports ActiveLook® smartglass integration for hands-free, heads-up sailing data. Accessible to All Sailors NMEAremote supports VoiceOver, Apple's built-in screen reader. Instrument titles and live values are fully accessible — so every sailor can stay informed, eyes-free, at any time. One Purchase. No Subscriptions. No Registration required Buy once for the full feature set. No recurring fees, no hidden costs, no adds. No charts — just clean, reliable instrument data done right. For any details, supported values, devices and messages visit: www.zapfware.de/nmearemote/ If you have any questions, suggestions or need support please send an e-mail to ios@zapfware.de

About

Cortex Onboard

Configure and update your marine electronics, and monitor vital boat data remotely. Receive alerts, view AIS information, and manage anchor watch from your mobile device.

Highlights
  • Configure and update Cortex devices
  • View AIS information and alerts
  • Manage Anchor Watch remotely
  • Monitor boat sensors and NMEA 2000 instruments
  • View battery, pressure, and position data
Read full description

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).

Screenshots

NMEAremote4 screens
Cortex Onboard4 screens

Verdict

The call

The clearest difference is price: Cortex Onboard at Free against NMEAremote's $23.99. Cortex Onboard also leads on in-app purchases (none vs 1). NMEAremote's advantage is rating (4.6 vs 3.8) and review sentiment (66% vs 56%). On ratings volume, update cadence and ads 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

Cortex Onboard is free to download; NMEAremote costs $23.99 up front. NMEAremote sells 1 one-off in-app purchase. Cortex Onboard asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NMEAremote holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 8 and 12 respectively. Written reviews point the same way: 66% of NMEAremote's written reviews are positive against 56% of Cortex Onboard's.

UpkeepUpdate frequency

NMEAremote ships an update every 3 months, Cortex Onboard every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
NMEAremote versus Cortex Onboard: the parameters behind the verdict, then further details
ParameterNMEAremoteCortex Onboard
Price$23.99Free — better
Rating4.6 (8 ratings) — better3.8 (12 ratings)
Positive reviews65.7% of reviews — better55.6% of reviews
Number of ratings812 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS12.0 — better18.5
Further details — not scored
Size10 MB22 MB
Age rating4+4+
DeveloperzapfwareGarmin New Zealand Ltd

Customer experience

NMEAremote

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews35 reviews
Positive65.7%
Neutral2.9%
Negative31.4%

Cortex Onboard

All ratings12 ratings
Positive66.7%
Neutral8.3%
Negative25.0%
Written reviews9 reviews
Positive55.6%
Neutral11.1%
Negative33.3%

In-app purchases

1 purchases

NMEAremote

One-time1
  • ExpeditionFree
None

Cortex Onboard

No in-app purchases

Questions

Is NMEAremote free?
NMEAremote costs $23.99, and also offers in-app purchases.
Is Cortex Onboard free?
Cortex Onboard is free to download, with no in-app purchases.
Which has better reviews, NMEAremote or Cortex Onboard?
NMEAremote is rated higher. NMEAremote averages 4.6 out of 5 from 8 ratings, while Cortex Onboard averages 3.8 from 12 ratings.
Do NMEAremote or Cortex Onboard have ads?
Neither NMEAremote nor Cortex Onboard shows ads.
Which is updated more often, NMEAremote or Cortex Onboard?
NMEAremote ships an update every 3 months, and Cortex Onboard every 2 months. Most recently, NMEAremote was updated on November 6, 2026 and Cortex Onboard on November 3, 2026.

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