Anchor & arm
Set your anchor point and swing radius, then arm in one gesture. Safe defaults everywhere — nothing to configure before you're protected.
Anchor watch · iOS & Android
Sleep soundly
at anchor.
AnchorZen keeps watch while you sleep. If your boat drags, the alarm sounds on the phone aboard — even with zero network — and your crew is alerted anywhere: push, SMS, email.
Free drag simulation — test the whole alarm chain before you trust it with your boat.
How it works
Three steps between you and a quiet night
Drop the hook, arm the watch, go to sleep. AnchorZen does the staring at the GPS for you.
The phone aboard keeps watch — 100% offline
Drag detection and the siren run entirely on the phone on board. No signal, no cloud, no problem: the alarm that matters never depends on the network.
Your crew is alerted, anywhere
Everyone else is notified through every channel — push first, then SMS and email as a safety net — until someone acknowledges the alarm.
Fail-safe by design
Silence never means “all is well”
AnchorZen is built like a safety instrument, local-first: detection and the siren live on the boat, the cloud only warns the others. And every link of the chain is watched.
If any link fails, you are told — never left guessing. Lost data at anchor? The local watch stays armed and you see, immediately, that remote alerts are down.
A dead-man switch, not wishful thinking
The watch phone reports position and health continuously. If the reports stop — crash, GPS off, flat battery — an alert is raised. A quiet app is treated as a failure, never as good news.
Watchdogs on every link
GPS, data, cloud, battery: each is monitored and shown at a glance. Any degraded state is visible from across the cabin — armed, armed-local-only, or alarm.
Battery, watched like the anchor
Best practice is a plugged-in phone — if it isn't, AnchorZen says so at arming. Unplugged and below the threshold (default 20%)? You're warned while there's still time to react.
Night mode that respects your sleep
System-health blips (a GPS dropout, a data gap) wait a configurable buffer before waking anyone. A confirmed drag alarm is never buffered, never filtered — it sounds immediately, for everyone.
Three roles, one crew
The boat watches. You decide. Everyone knows.
Roles can be combined on a single phone — at night aboard, the owner often is the watch: a solo skipper's phone does both at once.
The phone aboard
One of the owner's devices — their phone or an old tablet — left aboard. It watches GPS and the swing circle, sounds the local siren and reports position and health. Minimal interface: it's an instrument, not a dashboard.
Sets everything, from anywhere
The cruise has one owner. They adjust radius, night mode and thresholds remotely — from the cockpit or the restaurant. Every command shows its cycle: sent → pending → applied ✓.
Alerted, nothing more
Family, crew, the marina: observers receive alarms only. Nothing to configure, nothing they can break — just the certainty of being woken if it matters.
Two moments of serenity
At the restaurant, the market, on a hike — stay zen
AnchorZen covers both moments you're not staring at the anchor: the night you sleep aboard, and the day you leave the boat.
You sleep, the phone stares
The classic night watch: the phone aboard keeps its eyes on the swing circle so yours can close. If the boat drags, the siren wakes you immediately — network or not.
You leave the boat, everyone stays in the loop
Leave the watch phone aboard and step off — groceries, a stroll, dinner ashore. If the boat drags, everyone is alerted on their own phone, owner and observers alike, wherever they are.
Adjust from the dinner table. Wind picked up between courses? The owner widens the swing radius remotely — sent → pending → applied ✓ — no need to row back.
Perfect with a sentinel. An old smartphone plugged in aboard makes the ideal boat-sitter — it keeps the watch so your own phone can come ashore with you.
Pricing
Simple, honest — pay when it counts
No subscription. You pay per cruise, and a real alarm costs about as much as a cocktail ashore — cheap insurance against a very expensive night.
CHF 5 / cruise
Per cruise
Your first cruise is free and no credit card is required to get started. Real alarms (longer than 10 minutes) are billed normally — if your balance goes negative, you'll be asked to top up before starting a new anchorage. Your ongoing watch and alarms are never affected.
CHF 10 / real alarm
Only when it really mattered
Charged only if the drag lasts more than 10 minutes. Brief alarms are free — a false scare, an anchor that digs back in — you only pay when it really mattered.
At cost / SMS
SMS safety net
Free channels (push, email) are always tried first. SMS is only used as a fallback, billed at operator cost.
The alarm always sounds — even at zero balance. Safety is never blocked by billing; charges settle afterwards.
Test for free. The drag simulation is free — check the whole alarm chain as often as you like, we'll never make you hesitate.