HoldFast Anchor Alarm

Sleep soundly at anchor. HoldFast monitors your position 24/7 and sounds a Critical Alert the moment your boat drags.

Sleep Through the Night. Let HoldFast Watch the Anchor. Stop the 3:00 AM panic. Whether you’re tucked into a quiet cove or facing a midnight blow, HoldFast provides the professional-grade monitoring you need to sleep with total peace of mind. Designed by sailors for sailors, this is the most reliable, subscription-free anchor alarm on the App Store.

SET IT. FORGET IT. SLEEP.

Drop Anchor: Tap your current position or manually offset for the perfect drop point.

Set the Zone: Swipe to adjust your radius from 5m to 200m.

Rest Easy: HoldFast works in the background, watching your boat while you sleep.

WHY SAILORS TRUST HOLDFAST: ROCK-SOLID BACKGROUND TRACKING: Our optimized GPS engine stays awake even when your screen is off. If your boat moves, you’ll know.

USER-DEFINED SIGNAL ALERTS: Avoid "ghost" alarms. You set the threshold for GPS loss alerts—whether you want a notification after 30 seconds or 5 minutes of signal drop.

DUAL-STAGE PROGRESSIVE ALARMS: Don't just wake up when it's too late. Get a gentle alert as you approach the boundary, and a loud emergency alarm if you've truly broken free.

NIGHT-VISION FRIENDLY: A dedicated dark mode keeps your bridge dark and your night vision intact.

PRO FEATURES (ONE-TIME PURCHASE): REMOTE WATCH: Share a live, encrypted link with family or friends ashore. They can monitor your position in real-time from any web browser.

GPS TRACK HISTORY: See exactly how your boat swung throughout the night with a color-coded track path.

CUSTOM ALARM ZONES: Don't just settle for a circle. Draw custom shapes to avoid specific hazards like rocks, shallows, or nearby moorings.

AUDIBLE CUSTOMIZATION: Choose from a variety of piercing alarm tones to ensure you wake up instantly.

NO SUBSCRIPTIONS. NO ACCOUNTS. We believe safety tools shouldn't have a monthly fee. Pay once, own it forever. No data collection, no account setup, and no internet required for core alarm functions.

Download HoldFast today and take the stress out of the anchorage.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/