Comparison

iNmea logger vs Sailing Master M

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

Head to head
About

iNmea logger

Record 30-second logs of NMEA sentences received over WiFi. This tool helps debug NMEA instrument input issues for navigation apps. Logs can be emailed for further analysis.

Highlights
  • Record NMEA sentence logs
  • WiFi input over IP address and port
  • 30-second log duration
  • Email logs for analysis
  • Debugging tool for navigation apps
Features
Read full description

iNmea logger can be used to record a 30 seconds log of NMEA sentences coming in over WiFi, listening to a specific IP-address and port no. It's ment as a debugging tool for iRegatta, if you have NMEA instrument input that doesn't show up in these apps. The log can then be e-mailed to your self, or to Let's Create with a comment on what information you are missing.

About

Sailing Master M

This app provides comprehensive sailing data and performance optimization on various Apple devices. It displays over 35 sailing measurements from boat instruments, polars tables, and nautical charts, offering detailed wind, route, and map views. Connectivity is established through NMEA 0183 Wi-Fi gateways.

Highlights
  • Configurable data displays
  • 35+ sailing measurements
  • Wind, route, and map displays
  • NMEA 0183 Wi-Fi connectivity
  • Polars table integration
  • Nautical chart overlays
Features
Read full description

Sailing Master M offers comprehensive sailing data and performance optimization information on iPhones, iPads, iWatches, and ActiveLook smart glasses. The application provides configurable pages and data displays, utilizing over 35 sailing measurements from the boat’s instruments, polars tables, and nautical charts. On phones and pads, the Data and Analog Displays can include minimum and maximum values and time series graphs. The Wind Display provides wind, heading, route, and speed information. The Route Display shows the expected wind conditions on the next legs. The Map Display shows the vessel with direction, tacking and downwind laylines on a nautical chart, or the wind laylines in another location. The connectivity is through NMEA 0813 Wi-Fi gateways such as B&G Vulcan, Zeus, GoFree, Yacht Devices, Signal K, Actisense, and ShipModul. The application has evolved from its initial focus on NMEA data display to encompass a comprehensive suite of features. Consequently, the app’s name has been revised from 'Display0183M' to 'Sailing Master M'. For further information, please refer to the user’s guide available on the app’s website or within the app itself. Terms of use: The app is delivered under the Apple End User License Agreement (EULA, https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) The following libraries and services are used: - Kitura/BlueSocket, published under the Apache 2.0 license - A modified version of GPX package, published under BSD 3-Clause License and copyrighted by Ioannis Silks - OpenStreetMap licensed under the Open Data Commons Open Database License (ODbL, https://opendatacommons.org/licenses/odbl/) by the OpenStreetMap Foundation Licence, and ©OpenStreetMap contributors. OpenSeaMap, which is licensed under the Open Data Commons (ODbL) license, and ©OpenSeaMap contributors The supported NMEA 0183 sentences are: - BWR: Bearing and distance to waypoint - DBS: Depth below surface - DBT: Depth below transducer. - DPT: depth of water. - CGA: Global Positioning System Fix data - GLL: Geographic position Latitude/Longitude - HDG: Heading magnetic - HDM: Heading magnetic - HDT: Heading true - MWD: undocumented, wind direction, wind speed - MTW: water temperature °C - MWV: Wind speed and angle (A,T) - RMB: XTE, range to destination, bearing to destination, destination closing velocity . - RMC: Speed over ground - RSA: Rudder sensor angle - VHW: Water speed and heading - VLW: Distance travelled through water - VPW: Speed - measured parallel to wind - VTG: Course over ground (T or M), speed over ground - VWR: Wind direction (A), wind speed (A) - WCV: Waypoint closure velocity - XDR: air temperature (°C), water temperature (°C) and barometric pressure (mbar). - XTE: Cross track error The data items from NMEA and polars are: - Waypoint bearing - Waypoint distance - Time to Waypoint - VMG waypoint - Cross track error - Depth - Heading - Heading - Course - Course - Water speed - Speed over ground - Water temperature - Air temperature - Air pressure - Wind speed apparent - Wind angle apparent - Wind speed true - Wind direction - Wind direction - VMG Wind - Latitude, Longitude - Waypoint laititude, longitude - Water Distance after reset - Total water distance - Ground distance after reset - Total ground distance - Velocity made good towards wind - Heel - Rudder - Boat target speed through the water - Boat speed of target speed (%) - Beat VMG boat target speed through the water - Run VMG boat target speed through the water - GPS based trip distance - Leeway

Screenshots

iNmea logger2 screens
Sailing Master M4 screens

Verdict

The call

The clearest difference is in-app purchases: iNmea logger at none against Sailing Master M's 1. iNmea logger also leads on iOS requirement (9.0 vs 17). Sailing Master M's advantage is update cadence (every 2 months vs every 8 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sailing Master M sells 1 in-app purchase, starting at $11.99 per year. iNmea logger asks for nothing beyond the download.

UpkeepUpdate frequency

iNmea logger ships an update every 8 months, Sailing Master M every 2 months. The most recent releases landed on October 27, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
iNmea logger versus Sailing Master M: the parameters behind the verdict, then further details
ParameteriNmea loggerSailing Master M
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS9.0 — better17
Further details — not scored
Size2 MB25 MB
Age rating4+4+
DeveloperZifigoPekka Leppanen

Customer experience

iNmea logger

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sailing Master M

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

iNmea logger

No in-app purchases

1 purchases

Sailing Master M

Subscriptions1
  • Pro annual14 Days trial$11.991 Year

Questions

Is iNmea logger free?
iNmea logger is free to download, with no in-app purchases.
Is Sailing Master M free?
Sailing Master M is free to download, with in-app purchases available.
Do iNmea logger or Sailing Master M have ads?
Neither iNmea logger nor Sailing Master M shows ads.
Which is updated more often, iNmea logger or Sailing Master M?
iNmea logger ships an update every 8 months, and Sailing Master M every 2 months. Most recently, iNmea logger was updated on October 27, 2026 and Sailing Master M on October 13, 2026.

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