Product Development

Wind Anchor.

A GPS anchor watch and drag alarm for boats. It calculates your true swing radius from chain scope and catenary sag, then watches your GPS position against it — with offline maps, a live swing-history timeline, and a paired boat-watch / shore-watch mode so someone back on land can keep an eye on the anchor too.

Catenary swing radius
Offline anchorage maps
Boat & shore watch pairing
Drag alarm & anchor log

Currently in development — coming soon for iOS & Android

Wind Anchor launch screen — choose I'm on the Boat or I'm on Shore

Anchor watch map view with the swing circle over the anchorage

Live swing circle with boat position and swing-history timeline

Adjust anchor settings — depth, chain released, catenary swing radius, safety margin

Anchor bearing calibration — point the phone towards the anchor position

The case study.

The problem: Most anchor alarms draw a fixed circle that ignores chain scope, so they either cry wolf or miss a real drag.
Who it is for: Cruising sailors at anchor, and the crew ashore who want to keep an eye on the boat.
How it was built: A Flutter app for iOS and Android. It computes the true swing radius from scope and catenary sag, works on offline maps, and pairs a boat watch with a shore watch through a small relay. Designed and coded with AI coding agents.
Results: In development.

Want early access, or to try it on your own boat? Let's talk —

windanchor@antidot.gr