Predict
Timing, not guesswork
Forecast-driven crossings from your local hourly weather. Alerts are timed to your forecast, not a fixed schedule.
Beta open now
Comfort on timing, not the thermostat.
Thresho reads your local hourly forecast, predicts when the outdoor temperature crosses your comfort thresholds, and tells you when to open or close your windows.
Join the beta
TestFlight beta
US only · iPhone · free beta · no account required
Get it on your iPhone
Try the beta on your iPhone.
Thresho is a free beta on TestFlight, for iPhones in the US. Comfort on timing, not the thermostat.
On a computer? Scan to open the beta on your iPhone.
Join the betaWhat Thresho does
Pause
Air-quality aware
When outdoor air quality is poor, it holds the open-windows alert. If air-quality data is unavailable for your area, alerts run on temperature alone.
Private
Yours alone
No account required, no ads, never sold. To keep alerts reliable and learn which parts of the app are useful, Thresho collects a little anonymous usage, never your location, and you can turn it off in Settings at any time.