Safety Anchor Alarm is a GPS anchor alarm app for iPhone and Apple Watch that watches your boat while you rest — with an instant anchor drag alert the moment you move, even a meter.
Features
Built by sailors, for sailors. Every feature designed around real-world anchoring needs.
Continuously tracks your boat's position relative to where you dropped anchor. Precision down to a few meters.
The moment your anchor moves beyond your safe radius, you get a loud alarm. No missed alerts — even when your screen is off.
Set your own safe zone from 10 to 200 meters. Adjust it based on conditions, water depth, and how much chain you've let out.
See your anchor position, current boat position, and safe radius all on a real-time map. Visual confirmation at a glance.
Save your favorite anchorages and revisit them with stored coordinates. Build your personal library of trusted spots.
Calculate the right chain length, anchor scope, and swinging room. Take the guesswork out of anchoring safely.
Check your safe radius and anchor status right from your wrist. Glance down and know you're safe — no need to reach for your phone.
The full app runs natively on iPad, just like on iPhone — a bigger chart to watch your anchor from the cockpit or nav station.
How It Works
No complicated setup, no hardware needed. Just your iPhone and our app.
Anchor as you normally would. Once settled, open the app and tap to set your anchor position.
Adjust the safe zone radius based on your chain scope, water depth, and surrounding conditions.
Turn on the alarm and go about your day — or night. The app monitors your position continuously in the background.
If your boat drifts outside the safe radius, a loud alarm sounds immediately. React before it's too late.
App Preview
Clean, intuitive interface designed for quick access — even in rough seas.
Home Dashboard
Set radius and drop anchor
Alarm Active
Real-time anchor monitoring
Satellite View
Aerial map with live tracking
Night Mode
Easy on the eyes after dark
Anchor History
Your saved anchorage library
Lock Screen Widget
Monitor without opening the app
Anchorage Guides
Verified GPS coordinates, depths, holding, and a recommended anchor alarm radius for hundreds of anchorages across the Mediterranean and beyond.
Join the growing community of cruisers who anchor with confidence.
“Finally an anchor alarm that actually works reliably in the background. Used it across the entire Aegean coast this summer.”
Verified Sailor
Sailing Yacht, Turkey
“The safe radius feature is brilliant. I can adjust it based on how much chain I've let out and sleep without worry.”
Verified Sailor
Catamaran, Greece
“Simple, no bloat, does exactly what it promises. The anchor points feature is a great bonus for revisiting favorite bays.”
Verified Sailor
Motor Yacht, Croatia
FAQ
Download Safety Anchor Alarm and never worry about anchor dragging again. Free to download with optional premium features.
Free to download. Premium features available via subscription.