Tetrol

Tetrol runs your heating and cooling around where your household actually is. When everyone has left, the house relaxes to a wider temperature range and saves energy. As the first person heads back, it starts recovering — so it's comfortable when you walk in. If anyone is home, comfort always wins. HOW IT WORKS • Four distance zones around your home: Home, Nearby, Around town, Far away • Each zone holds a temperature range you choose — heat below, cool above, leave it alone in between • The nearest family member decides the zone, so one person at home means full comfort • Manual override any time; automation never fights it • A full activity feed explains everything the system did and why PRIVATE BY DESIGN • Your location never leaves your phone — distances are computed on-device • No account, no cloud service of ours, no analytics, no ads • Thermostat access stays between your phone and Google or your own Home Assistant hub WHAT YOU NEED • Google Nest: sign in with Google — no hub needed • Any other brand (ecobee, Honeywell and more): connect through a Home Assistant hub on your home network • Just looking? Try the built-in demo thermostat to see how it all works Works while the app is closed when you allow "Always" location access.