Ankr – Smart Boat Anchor Monitoring App gives you peace of mind every time you drop the hook. Built specifically for boaters, sailors, and cruisers, Ankr continuously tracks your position relative to your anchor and alerts you instantly if your boat drags or drifts outside a safe zone.

Anchoring can be stressful, especially overnight or in changing weather. Ankr takes the guesswork out by combining real-time GPS monitoring, intelligent scope calculations, and customizable alerts into one simple, reliable mobile app. Whether you’re stopping for a swim, anchoring for the night, or riding out a blow, Ankr helps ensure your boat stays where you left it.

Key Features

⚓ Anchor Drop & Set

Mark your anchor position directly on the interactive map when you drop the hook.
Automatic swing radius calculations based on water depth and rode scope (3:1, 5:1, 7:1).
Manual radius adjustments for full control over your safe zone.

📍 Real-Time GPS Monitoring

Continuous position tracking with configurable update frequency (1–60 seconds).
Boat marker shows live position relative to your anchor.
Distance indicator so you always know how far you are from your anchor point.

📡 Drag Detection & Alerts

Instant alarms if your boat drifts outside the set radius.
Customizable alarm sounds, vibration, and push notifications.
Works in the background — even when the phone is locked or app is closed.

🌊 Map & Visualization

Interactive maps with standard and satellite views.
Anchor marker plus scope circles showing swing area and ratios.
GPS accuracy heatmap to visualize signal quality.
Anchor history overlay for reviewing past anchoring sessions.

🔔 Smart Notifications

Loud drag alarms with vibration for immediate awareness.
Low battery warnings when your device charge drops too low.
GPS loss or stale data alerts to ensure you never anchor blind.
Push notifications so alerts reach you even in the background.

📱 Multi-Device Sync (Premium)

Share your anchoring session across crew members’ devices.
One device acts as the “primary” anchor monitor, others can view live status.
Real-time synchronization of position, alarms, and anchor radius.

⚙️ Customization & Control

Adjustable GPS accuracy threshold (5–30 meters).
Location update frequency (1 second to 1 minute).
Auto buffer distance to add safety margin.
Choose between meters and feet for global compatibility.
Full alarm configuration – drag, vibration, battery, GPS, and more.

🔗 Sharing & Collaboration (Premium)

Share your anchor position securely with friends, crew, or other boaters.
Social sharing via SMS, WhatsApp, email, or public map opt-in.

Why Choose Ankr?

Peace of mind: Relax, sleep, or go ashore knowing you’ll be alerted immediately if your anchor drags.
Safety first: Prevent groundings, collisions, or drifting into hazards.
Educational visuals: Learn proper anchoring techniques with scope circles and ratios.
Battery aware: Low battery alerts prevent monitoring from cutting out.
Works offline: Core GPS tracking and alarms run without internet access.
Global use: Supports both metric and imperial units.

Subscription Options

Free Tier: Core anchor monitoring features, drag detection, alarms, and GPS tracking.
Premium: Multi-device sync, anchor sharing, advanced customization, and collaboration tools.

Who Is Ankr For?

Recreational boaters and sailors
Liveaboards anchoring regularly
Cruisers on extended voyages
Charter crews and delivery skippers
Anyone who drops the hook and wants peace of mind