Everything You Need
At Anchor

Built by sailors, for sailors. Safety Anchor Alarm packs powerful monitoring tools into a simple, intuitive interface you can trust with your boat's safety.

GPS Anchor Monitoring

Safety Anchor Alarm uses your iPhone's GPS to continuously track your boat's position relative to your anchor point. The moment you drop anchor and activate the alarm, the app starts monitoring in real-time — even when your screen is off or your phone is locked.

  • Real-time position tracking with GPS
  • Background monitoring — works while phone is locked
  • Live distance display in meters from anchor point
  • Coordinate display for precise positioning
GPS anchor monitoring with live distance tracking

Instant Drag Alerts

If your boat moves beyond your set safe radius, a loud alarm sounds immediately. The alarm works even when your phone is locked, ensuring you never miss a critical alert while sleeping or away from your device.

  • Loud alarm that cuts through ambient noise
  • Works with screen locked and app in background
  • Continuous monitoring with configurable update intervals
  • Clear visual and audio feedback
Anchor drag alert with satellite map view

Adjustable Safe Radius

Set your own safe zone radius based on conditions. Whether you're in a tight anchorage needing a small radius or anchored in an open bay with plenty of room, you have full control over the alarm trigger distance.

  • Adjustable from 10 to 200+ meters
  • Easy +/- controls for quick adjustment
  • Visual radius overlay on the map
  • Adapt to chain scope, depth, and conditions
Adjustable safe radius control panel

Night Mode

Switch to a dark interface that's easy on the eyes during nighttime anchor watches. The dark theme reduces screen glare while still providing all the information you need at a glance.

  • Dark color scheme optimized for night vision
  • All monitoring features fully functional
  • Reduces eye strain during night watches
  • Quick toggle in app settings
Night mode dark interface for nighttime monitoring

Anchor Points Library

Build your personal collection of favorite anchorages. Every time you anchor, the app saves the location with details like date, radius used, and duration. Return to proven spots with confidence.

  • Automatic session logging with date and time
  • Track radius used and anchoring duration
  • Edit names for easy identification
  • Quick return to last anchor position
Anchor points history with saved anchorages

Lock Screen Widget

Monitor your anchor status without even opening the app. The iOS lock screen widget shows your current distance from the anchor, safe radius, and safety status at a glance — perfect for quick checks during the night.

  • Current distance from anchor point
  • Safe radius indicator
  • Green/red safety status
  • Updates automatically in real-time
iOS lock screen widget showing anchor alarm status

Ready to Anchor with Confidence?

Download Safety Anchor Alarm for free and never worry about anchor dragging again.

Download for iOS — Free