Comparison

WatchMate vs WilhelmSK

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

Head to head
About

WatchMate

This app provides remote control and situational awareness for your Vesper Marine AIS Transponder. View AIS targets, manage alarms, and control transponder settings directly from your mobile device.

Highlights
  • View AIS targets
  • Manage collision prevention alarms
  • Control Anchor Watch alarm
  • View GPS position, course, and speed
  • Remote control transponder settings
  • Configure vessel AIS static data
  • Perform firmware upgrades
Read full description

The WatchMate App connects with your Vesper Marine AIS Transponder to place remote control functionality and situational awareness in the palm of your hand on your iPhone or on your iPad. The WatchMate App becomes the user interface for configuring and remote control of your Vesper Marine AIS Transponder, especially where it does not have its own display such as the Vesper Marine XB-8000. - View AIS Targets received by your Vesper Marine AIS Transponder. - Setup and manage collision prevention alarm profiles. - Manage your MOB alarms. - Control and view your Anchor Watch alarm. - View your AIS Transponder's own GPS Position, Course and Speed. - Check the operational status of your AIS Transponder. - Remote control of your AIS Transponder settings. - Switch easily between Silent Mode and Normal Transmitting mode. - Configure your Vessel's AIS Static data. (MMSI, Call Sign, Vessel Type, Vessel Size) - Perform firmware upgrades. Connects to your WatchMate device's WIFI access point or by being on the same wifi network. - Supports Vesper Marine XB-8000 AIS Transponder. - Supports Vesper Marine WatchMate Vision®. The complex nature of our innovative WatchMate App makes coding mishaps difficult to eliminate despite the superhuman efforts of our developers so please remember Vesper Marine does not warrant that this product is error-free. As the adventurous user it's your job to exercise common sense and the best navigational judgement you can muster. Although we think the WatchMate App is awesome nothing beats using all your human senses, so best you still rely on these at least as much as you rely on the WatchMate App for making navigational safety decisions. Our advice is; even with the WatchMate App it’s still a clever idea to maintain a permanent watch and use more than one aid for navigation.

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
Read full description

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

WatchMate4 screens
WilhelmSK4 screens

Verdict

The call

The clearest difference is price: WatchMate at Free against WilhelmSK's $19.99. WilhelmSK's advantage is rating (4.5 vs 3.5) and review sentiment (80% vs 44%). On ratings volume, 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

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

ReceptionRating · Positive reviews · Number of ratings

WilhelmSK holds the better App Store score, 4.5 against 3.5. Both are backed by a comparable volume of ratings — 11 and 28 respectively. Written reviews point the same way: 44% of WatchMate's written reviews are positive against 80% of WilhelmSK's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on June 1, 2026 and September 11, 2026 respectively.

Scorecard5 real differences · 5 level
WatchMate versus WilhelmSK: the parameters behind the verdict, then further details
ParameterWatchMateWilhelmSK
PriceFree — better$19.99
Rating3.5 (11 ratings)4.5 (28 ratings) — better
Positive reviews44.4% of reviews80.0% of reviews — better
Number of ratings1128 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple TV, Apple Watch — better
Requires iOS13.013.0
Further details — not scored
Size14 MB118 MB
Age rating4+4+
DeveloperGarmin New Zealand LtdScott Bender

Customer experience

WatchMate

All ratings11 ratings
Positive45.5%
Neutral27.3%
Negative27.3%
Written reviews9 reviews
Positive44.4%
Neutral22.2%
Negative33.3%

WilhelmSK

All ratings28 ratings
Positive89.3%
Neutral0.0%
Negative10.7%
Written reviews20 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

WatchMate

No in-app purchases

None

WilhelmSK

No in-app purchases

Questions

Is WatchMate free?
WatchMate is free to download, with no in-app purchases.
Is WilhelmSK free?
WilhelmSK costs $19.99, with no in-app purchases.
Which has better reviews, WatchMate or WilhelmSK?
WilhelmSK is rated higher. WatchMate averages 3.5 out of 5 from 11 ratings, while WilhelmSK averages 4.5 from 28 ratings.
Do WatchMate or WilhelmSK have ads?
Neither WatchMate nor WilhelmSK shows ads.
Which is updated more often, WatchMate or WilhelmSK?
WatchMate ships an update every 2 months, and WilhelmSK every 2 months. Most recently, WatchMate was updated on June 1, 2026 and WilhelmSK on September 11, 2026.

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