Anchor Mate: Anchor Drag Alarm

Sleep well on the hook. Anchor Mate keeps an anchor watch on your boat's GPS position while you rest and sounds a loud alarm the moment the anchor drags. And not on one phone only: every crew phone aboard sounds it too, over Bluetooth and Wi-Fi, with no internet and at no cost.

ANCHOR ALARM
• Set the anchor where you are, on the map, or by distance and bearing from your position
• A simple circle, or an advanced sector zone with different distances in different directions
• A loud alarm as soon as the boat leaves the safe area
• Fewer false alarms: uses GPS only (never Wi-Fi or mobile network positions), ignores inaccurate fixes, and waits a moment before sounding
• Rings on the alarm channel, even when the phone is on silent
• Keeps watching with the screen off
• Easy on the battery: GPS checks less often while the boat is well inside the zone, every second near the edge
• Choose your own alarm sound

GPS AND BATTERY WATCH
• An alarm when the GPS signal is lost for too long
• An alarm when the phone battery runs low
A silent phone never means a quiet night by mistake.

CREW: EVERY PHONE ABOARD
• Add crew with a QR code. No accounts, no sign-up.
• Crew phones follow the boat and sound the alarm with it, over Bluetooth and Wi-Fi, with no internet
• Crew stay added: each time you set the anchor, their phones start following on their own
• Make one crew member the captain: they can silence the alarm for everyone and change the alarm distance
• Free on every phone

FREE AND PREMIUM
• Free: the anchor alarm, all alarms, crew phones aboard, history. No ads, no account.
• Premium (subscription): crew ashore follow the boat over the internet and get the alarm wherever they are.

MORE
• Movement history: see how the boat swung on its anchor and keep a log of past anchorages
• Map and satellite views
• Dark mode for night watches
• Works offline: the alarm runs on the phone itself. Internet is only needed for maps and for crew over the internet.
• In English, German, French, Spanish, Italian and Ukrainian

Made by sailors, for sailors.

Questions or problems? Tap Help → Send feedback in the app. We read every message.

Anchor Mate is an aid to keeping an anchor watch, not a replacement for good seamanship. GPS, phone batteries and mobile networks can fail.