Anchor Alarm Pro
GPS drag watch for sailors
About
This app acts as a reliable anchor watch for boaters. It alerts you with a loud, escalating alarm if your vessel drifts outside a set safe radius, ensuring peace of mind while at anchor. It supports various anchor zone shapes and offers flexible GPS input options.
What's New in Anchor Alarm Pro
1.15.0
November 1, 2026
A new watch now always alarms: on a fresh watch with the default radius, the alarm could stay silent. New: send your anchor watch to an MQTT broker, under Settings. It only publishes and is off by default. The second phone is told clearly when data stops, and a paused watch says so on every screen. Alarms on the second phone are more reliable, GPS links reconnect by themselves, and editing a no-go area can be cancelled safely. Pushes now reach a phone that joins a watch without restarting the app.
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FAQ
What is Anchor Alarm Pro?
Anchor Alarm Pro is a free navigation app that functions as a dependable anchor watch for boaters. It alerts you with a loud alarm if your boat drifts outside a designated safe zone.
Does Anchor Alarm Pro have ads?
No, Anchor Alarm Pro is ad-free, allowing for an uninterrupted user experience while you are at anchor.
What devices does Anchor Alarm Pro support?
Anchor Alarm Pro is available for iPhone and iPad devices, making it accessible to a wide range of Apple users.
How does Anchor Alarm Pro handle different anchoring situations?
It offers flexible anchor zones, including simple circular zones, sector zones for tidal swing, and bow/stern corridors for specific mooring types.
Can I monitor my boat remotely with Anchor Alarm Pro?
Yes, you can share a short code to link a second device for remote monitoring. This allows you to receive drag alarms and view live boat position even when you are not on the boat.
How accurate is the GPS in Anchor Alarm Pro?
The app utilizes the built-in iPhone GPS but also supports external Bluetooth GPS receivers and NMEA 0183/Signal K data for enhanced accuracy. It automatically selects the most accurate connected source.
What is the age rating for Anchor Alarm Pro?
Anchor Alarm Pro has an age rating of 4+, indicating it is suitable for users of all ages.
How often is Anchor Alarm Pro updated?
The app was last updated on October 30, 2026, with version 1.14.0, suggesting regular maintenance and feature additions by the developer.
