Your sprinkler controller shouldn’t stop thinking when your internet does. Most “smart” controllers route every watering decision through the manufacturer’s cloud — your phone talks to their servers, their servers talk to the box on your wall. Sprinkler Gnome doesn’t. It runs entirely on your own network: no account, no subscription, no servers standing between you and your sprinklers.
Smart watering that doesn’t phone home
Sprinkler Gnome makes every decision on the device, on your LAN. It runs an FAO-56 ET₀ water-balance model for each zone — tracking how much water the soil lost to sun and plants — then waters just enough to refill the deficit, with a soil-moisture sensor correcting the model against what your ground actually did. That’s genuinely smart watering, and none of it depends on someone else’s data center.
Why local control wins
- It keeps working. An internet outage, a Wi-Fi hiccup, or a company sunsetting a service won’t stop your lawn from being watered right.
- Your data stays home. Your watering patterns and soil readings are a quiet map of when you’re away and how your property behaves. They never leave your network.
- Nothing to rent. No account that can be paywalled later, no features that can be moved behind a subscription after you’ve bought the hardware.
This is the difference between a controller that’s connected and one that’s dependent — and it’s the thing the cloud-first incumbents can’t easily copy, because their whole business runs through the cloud.
No subscription — and it stays that way
Sprinkler Gnome is a one-time purchase at $150. There’s no monthly fee, no “premium” tier, and no plan to add one. You own the hardware and everything it does.
Smarter than the cloud guys — and it learns your yard
Skipping the cloud doesn’t mean skipping intelligence — it means more of it, kept local. Sprinkler Gnome runs a full FAO-56 ET₀ water-balance model and then learns your specific soil and your sprinklers’ real output, watering more accurately the longer you own it. That’s genuine on-device AI, and it’s something the weather-based incumbents simply don’t do. Here’s the full ET₀ + soil-learning model.
What you’ll save
Watering to actual need instead of a fixed timer is where the savings come from. The EPA finds a smart, WaterSense-labeled controller saves an average home nearly 7,600 gallons of water a year (EPA WaterSense). Sprinkler Gnome waters the same way — to need, not to a clock. Here’s the estimate for your own yard, climate, and water rate:
Compared against a standard scheduled timer — edit its schedule
We compare your lawn’s actual need against a standard scheduled timer running this routine (it runs the same minutes rain or shine — that’s the waste). Defaults to ~1.5 in/week.
The bottom line
If you want smart watering that keeps working, keeps your data, and never bills you again, the list is short — and Sprinkler Gnome is built for exactly that.