Comparison

Sailserver vs OnboardAssistant

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

Head to head
About

Sailserver

This app automatically logs your sailing trips, providing an online, up-to-date record. It also monitors your boat's position and alerts you to changes, and allows you to share your sailing adventures with friends and family.

Highlights
  • Automatic sailing logbook
  • Boat position monitoring and alerts
  • Share sailing trips with friends/family
  • Connect with and follow other sailors
  • View nearby boats in the Clubhouse
  • Detailed weather map and forecast
  • Connects to boat instruments (NMEA 2000/0183, SeaTalk)
Features
Read full description

Automatic Logbook Sailserver automatically keep a logbook, each time you go sailing. The logbook can be viewed online and is always up to date. Anchor Watch and Monitor Sailserver monitors your boat when you are not onboard. Get notified when there are any changes in your boat’s position, wind speed or water depth. Share your passion for sailing. Friends and family can view the boat’s logbook, and live data from your boat instruments, even while you are sailing. Ideal for both cruising or racing. Connect with your friends or follow other sailors Connect with your friends and see where and how they are sailing. Or follow your favorite sailors when they are racing or on a long cruise. Meet other sailors When you enter the Sailserver Clubhouse you can see other boats near you and they can see your boat. Weather map Show a detailed weather map and forecast for the boat’s position. Connects to the boat instruments Sailserver can be connected to the boat instruments and collects data like wind direction and speed, water depths and temperature, Speed through water, boat heeling and much more. All data can be viewed online and are used to make a very detailed logbook. Sailserver connects to most brands like Raymarine, Garmin, B&G or other boat instruments with NMEA 2000, NMEA 0183 or SeaTalk Interface. Before using the Sailserver app please create a free account on sailserver.com. Some of the features in the Sailserver app are limited or not available without a Sailserver installed in your boat. If you do not have a boat with a Sailserver installed, you can still use the Sailserver app to follow or connect to other sailors with a Sailserver onboard. Read more about Sailserver and how to install it here: https://sailserver.com

About

OnboardAssistant

Features
Read full description

OnboardAssistant is a handy little tool for yacht racing which will complement your onboard electronics and let you get rid of wet notes. It will let you ping sail changes, race times, changes in boat configuration, incidents, performance comments and any other important user-defined event which is not captured directly by your electronics. It also lets you take pictures, record audio and video while you are out on the water. Once your sailing session is complete you can review and update your notes and upload it all to the cloud. Once in the cloud, the data can be accessed by a number of thrid party tools such as SailingPerformance's RaceReplay. All your data will then be automatically be loaded and synchronized, ready to be analyzed! Terms of use available at: https://www.advancedsailingperformance.com/oba-terms-service.html

Screenshots

Sailserver4 screens
OnboardAssistant4 screens

Verdict

The call

The clearest difference is update cadence: OnboardAssistant at every 5 weeks against Sailserver's every 8 months. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sailserver ships an update every 8 months, OnboardAssistant every 5 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 7 level
Sailserver versus OnboardAssistant: the parameters behind the verdict, then further details
ParameterSailserverOnboardAssistant
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 8 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size53 MB37 MB
Age rating4+4+
DeveloperSailserver ApsSailingPerformance S.L

In-app purchases

None

Sailserver

No in-app purchases

None

OnboardAssistant

No in-app purchases

Questions

Is Sailserver free?
Sailserver is free to download, with no in-app purchases.
Is OnboardAssistant free?
OnboardAssistant is free to download, with no in-app purchases.
Do Sailserver or OnboardAssistant have ads?
Neither Sailserver nor OnboardAssistant shows ads.
Which is updated more often, Sailserver or OnboardAssistant?
Sailserver ships an update every 8 months, and OnboardAssistant every 5 weeks. Most recently, Sailserver was updated on November 3, 2026 and OnboardAssistant on October 30, 2026.

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