Comparison

SeasLink vs WilhelmSK

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

Head to head
About

SeasLink

Features
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This will add the value to Hyundai SeasAll’s engines. It is a smart phone application for self-diagnosis, black box and other useful function for all of the Hyundai SeasAll engines. It shows rpm, boat speed, coolant temperature, voltage, fuel consumption and engine failure code. It can save your running information for a while and can send it to our server to be used for your diagnosis and maintenance. In addition, it has many useful function to add you the value to your voyage.

About

WilhelmSK

This app provides a customizable dashboard for monitoring and controlling boat systems. It integrates with various marine electronics and offers features like alarm notifications, autopilot control, and chart display.

Highlights
  • Customizable display and monitoring dashboard
  • Integrates with Signal K Server and various marine devices
  • Autopilot control and monitoring
  • Active Captain Points of Interest display
  • Alarms and push notifications
  • Navionics chart display
  • Customizable gauges and layouts
Features
Currently charting
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WilhelmSK is a highly customizable display, monitoring and control dashboard for your boat. WilhelmSK works best wth Signal K Server . It can also connect directly to some devices: º NMEA 0183 over TCP or UDP. (from for example, Digital Yacht's Smart WLN10) º Any modern Navico (Lowrance, Simnet or B&G) GoFree MFDs º NMEA 2000 via Yacht Device's YDWG-02, YDEN º NMEA 2000 via Actisense W2k-1 or W2K-2 º Victron Venus GX or CCGX º Victron VRM º Chetco SeaSmart Devices º Chetco HelmSmart RayMarine and Simrad/B&G Auto Pilot Support (via node-server or the YDWG only, W2K-1) º View or change current mode º View current target heading or Wind direction º Change target heading or Wind direction Alarms and Notifications º View list of current current alarms º Push notification support * º Setup server side alarms * º Set an anchor alarm with the push of a button * Navionics Maps If you already have the Navionics Boating application with an active subscription, you can now use the same Navionics charts in WilhelmSK. Ensure you are a registered user with Navionics and have a Username and Password. If you have not registered, go to the Navionics Boating App’s Main Menu, click on the top “Me” option and then click Login. In WilhelmSK click the login button on the bottom right of the map and enter your Navionics login information. Features: - Raymarine MFD: display and interact with a RayMarine MFD (discovered via Bonjour) - Fusion stereo (control zone volumes, source input, play, pause etc.) - Create a gauge for any value available via SignalK - Sophisticated anchor alarm (requires node server and signalk-anchoralarm-plugin) - Customize gauge display using SignalK meta.zones - Customize gauge range, min/max, etc. - Save custom gauges to node server or the cloud for use on other devices - Wind Angle gauges can optionaly be rotated so that they always point ot the bow of the boat, regaurless of device positioning - Place gauges by long pressing on a gauge and choosing a differnt one - Make a gauge full screen by double tapping - Multiple layout support. Create a differnt layout for Steaming, Sailing, Home Monitoring, etc. - Customize the nuber of pages and their layout - Manuall connection configuration synced accross devices via iCloud - Automatic connection selection based on current ip (usefull when Bonjour is not available and you have multiple boats) - Two themes, dark and light - Animated gauge needles - iPad Slideover and Split View support (Your gauge configuration can be customized for these views) - Connections can be configured to be refreshed manually or at a specific time interval - Design your own custom gauge templates - Share your custom templates via Air Drop, eMail, Text, etc. - Edit ApplyTV or other device layouts and templates remotely using your iPhone or iPad - Most gauges can be configured to be digital or analog - Enter the SignalK path and title for any gauge to show data not supported by default - Displays AIS targets in the Map views - Configure node server plugins inside of the app - IP and RTSP camera display * Some advanced features require signalk-server-node and special plugins installed. Setup Instructions at https://github.com/sbender9/wilhelmsk-node-server-setup

Screenshots

SeasLink1 screens
WilhelmSK4 screens

Verdict

The call

The clearest difference is price: SeasLink at Free against WilhelmSK's $19.99. SeasLink also leads on iOS requirement (8.0 vs 13.0). WilhelmSK's advantage is chart position (#140 vs unranked) and device support (5 vs 2). On update cadence, ads and in-app purchases 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

SeasLink is free to download; WilhelmSK costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 4, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 7 level
SeasLink versus WilhelmSK: the parameters behind the verdict, then further details
ParameterSeasLinkWilhelmSK
PriceFree — better$19.99
Rating—4.5 (28 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—28 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#140 — better
DevicesiPhone, iPodiPhone, iPad, iPod, Apple TV, Apple Watch — better
Requires iOS8.0 — better13.0
Further details — not scored
Size17 MB118 MB
Age rating4+4+
DeveloperRoadPia Co., Ltd.Scott Bender

In-app purchases

None

SeasLink

No in-app purchases

None

WilhelmSK

No in-app purchases

Questions

Is SeasLink free?
SeasLink is free to download, with no in-app purchases.
Is WilhelmSK free?
WilhelmSK costs $19.99, with no in-app purchases.
Do SeasLink or WilhelmSK have ads?
Neither SeasLink nor WilhelmSK shows ads.
Which is updated more often, SeasLink or WilhelmSK?
SeasLink ships an update every 2 months, and WilhelmSK every 2 months. Most recently, SeasLink was updated on October 4, 2026 and WilhelmSK on October 26, 2026.

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