# WilhelmSK vs Cortex Onboard

The clearest difference is price: Cortex Onboard at Free against WilhelmSK's $19.99. WilhelmSK's advantage is rating (4.5 vs 3.8) and review sentiment (80% vs 56%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

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

WilhelmSK holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 28 and 12 respectively. Written reviews point the same way: 80% of WilhelmSK's written reviews are positive against 56% of Cortex Onboard's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 11, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | WilhelmSK | Cortex Onboard |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[4.5 (28 ratings)](https://appshunter.io/ios/app/wilhelmsk/id1150499484/reviews)** | [3.8 (12 ratings)](https://appshunter.io/ios/app/cortex-onboard/id1483406085/reviews) |
| Number of ratings | **28** | 12 |
| Positive reviews | **80.0% of reviews** | 55.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 118 MB | 376 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple TV, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scott Bender](https://appshunter.io/developer/1150499483) | [Garmin New Zealand Ltd](https://appshunter.io/developer/557485484) |

## What reviewers say

### WilhelmSK

[App page](https://appshunter.io/ios/app/wilhelmsk/id1150499484)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Cortex Onboard

[App page](https://appshunter.io/ios/app/cortex-onboard/id1483406085)

This app allows you to configure and update your marine electronics from your mobile device. Monitor vessel data, receive alerts, and manage features like Anchor Watch from anywhere on board.

**Highlights:** Configure and update Cortex devices, View AIS information and alerts, Manage Anchor Watch, Monitor vessel sensors, Connect NMEA 2000 instruments

**In-app purchases:** none


## Frequently asked questions

### Is WilhelmSK free?

WilhelmSK costs $19.99, with no in-app purchases.

### Is Cortex Onboard free?

Cortex Onboard is free to download, with no in-app purchases.

### Which has better reviews, WilhelmSK or Cortex Onboard?

WilhelmSK is rated higher. WilhelmSK averages 4.5 out of 5 from 28 ratings, while Cortex Onboard averages 3.8 from 12 ratings.

### Do WilhelmSK or Cortex Onboard have ads?

Neither WilhelmSK nor Cortex Onboard shows ads.

### Which is updated more often, WilhelmSK or Cortex Onboard?

WilhelmSK ships an update every 2 months, and Cortex Onboard every 2 months. Most recently, WilhelmSK was updated on September 11, 2026 and Cortex Onboard on June 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*