Run your home when electricity is cheapest.
Wattspotter spots the cheapest quarter hours of the spot price and runs your water heater, radiators and heat pump in them. You set the rules, the app does the rest every day.
Join the betaClosed beta on Android. Public release on Google Play and the App Store later.
How it works
Pick your devices
Sign in and pick the Google Home devices to schedule: smart plugs, relays, thermostats and air-to-air heat pumps.
Set your rules
How many hours, at what time, what counts as expensive and which temperature is never undercut. You see the schedule in advance.
Let it run
Our server computes the schedule every day from the published prices and drives your devices through Google Home automations.
What it does
Cheapest quarter hours
Water heater or floor heating on during the cheapest hours of the day, to the quarter hour.
Heat pump by price
Pre-heats before an expensive period and lowers the temperature during expensive hours, always within your limits.
Frost guard
Minimum temperature and frost protection come before price. Your cottage will not freeze for cheap power.
Price limits and timers
Always on below your own price limit, off when expensive. Timers also follow sunrise and sunset.
Works without your phone
The schedule runs on our server and in Google Home. Your phone can be off or lost.
You stay in control
Override at any time from the app or Google Home. Every switch is explained: why on, when off.
Devices
Wattspotter controls devices that appear in Google Home. They keep working in their own apps too.
- Water heater
- Radiators and floor heating
- Air-to-air heat pump
- EV charging
- Sauna and other loads
- Temperature sensors
FAQ
Do I need a spot-price contract?
The savings come from prices that change every hour, so a spot-price contract. With your contract details the app also shows the total price including grid fees.
Where do the prices come from?
Finnish day-ahead prices from the ENTSO-E Transparency Platform. Prices for the next day are published around 14:00 Finnish time.
Does my phone need to be on?
No. The schedule is computed on our server and devices are driven by Google Home automations. You only need the phone to change rules.
What does it cost?
The beta is free. Pricing will be announced before the public release.
What data is stored?
Your rules, the identifiers of the devices you schedule and the switching history. No selling, no advertising, and you can delete your account at any time.
Data in the EU · no ads · delete your account at any time