Protect your boat or RV — even when you're miles away.
A platform with a free core app that watches your most critical systems. Dead batteries stop bilge pumps. A burst line on an unlimited city-water hookup can sink a boat or flood a cabin. Guardian catches it early — using affordable, off-the-shelf sensors and automatic shutoff valves.
- 🆓 Free core app
- 🛠️ Off-the-shelf hardware
What's at stake
The failures that ruin a trip — or total a vessel — are almost always quiet ones. They happen while you're asleep, at the office, or three states away.
City water never sleeps
A cracked fitting or burst hose on an unlimited city-water hookup can push hundreds of gallons into your cabin or coach while you're away. There's no tank to run dry.
A dead battery is a dead bilge pump
Lose your 12V system and you lose the bilge pump, the fridge, and your safety electronics. On the water, a flat house bank can quietly become an emergency.
Shore power drops silently
A tripped pedestal at the marina or campground kills your charging and refrigeration — and you won't know until the food spoils or the batteries are flat.
Smart-home hardware, built for the water and the road
Guardian doesn't sell you proprietary marine electronics at marine prices. It turns the same affordable IoT sensors and valves used in millions of homes — LinkTap and Shelly — into a purpose-built monitoring system for vessels and rigs.
- Sense: Flood sensors, voltage monitors, and power meters watch the systems that matter.
- Decide: The app — on your phone, laptop, or nav station — tracks every reading in real time.
- Act: When a line bursts, the LinkTap valve slams shut automatically — and you get a push notification anywhere in the world, on every plan including Free.
One dashboard for everything
Water, power, and climate — monitored locally when you're aboard, and over the cloud when you're not.
Automatic water shutoff
LinkTap smart valves meter real-time flow and slam shut the instant usage spikes past your limit — stopping a burst line before it floods.
12V & shore power health
Track house and starter banks plus shore-power status with the Shelly Uni and PM Mini, so a dead battery never strands you.
Instant cloud alerts
Shelly sensors fire straight to a Cloudflare Worker, so the push notification reaches you the second water is detected — wherever you are. Away push alerts are included on every plan, including Free.
Works offline
Aboard and off-grid, the app talks directly to your sensors with zero latency and zero internet.
Tailored to how you travel
The same system, tuned for the realities of life on the water and on the road.
For your boat
- Bilge pump readiness Keep batteries charged so the pump runs when it has to.
- Freshwater burst mitigation Shut the water the moment a freshwater line lets go.
- Power assurance Know your charging is alive before you leave the slip.
For your RV
- No dead batteries Catch deep discharge before it kills your bank or starter.
- Burst-pipe defense Limit damage from city-water plumbing failures while you're out.
- Peace of mind Leave the campsite knowing the coach is watching itself.
Liveaboards, winter layup, full-timers, shared boats and small fleets — see how Guardian fits the way you actually use your rig.
Explore all use cases →Built by boaters and RVers, for boaters and RVers
Guardian started with a simple frustration: the gear to protect a vessel or rig was overpriced, locked down, and rented back to you by subscription. So we built the opposite.
💸 Free to run, no catch
The core app is free — no license fee to run it. Monitoring, alerts, closing the valve from anywhere, the flood shutoff — local and the cloud fallback — and away push alerts cost nothing. Optional plans cover valve control (opening the valve from the app, run programming, live flow metering) plus automatic remote monitoring, extra alert destinations, and history.
🛠️ No proprietary hardware
Guardian runs on affordable, off-the-shelf sensors and valves you buy once and own — no marine-priced black boxes, no hardware subscription.
🤝 Driven by people who live this
Every fix, sensor, and feature comes from boaters and RVers. Tell us what your rig needs — hardware suggestions shape the roadmap.
Ready to protect your rig?
Pick your hardware, install the app, and travel knowing your vessel is watching itself.