Timing
Catch the Delta breeze
Thresho knows when the evening Delta breeze arrives and tells you the moment to open up, before your rooms heat back up.
Know whether to open, close, or wait, at a glance. No AC, no hardware, no account. We're looking for a small group of California iPhone owners to test it on real hot days.
California only · iPhone · free · no account required
Thresho watches the forecast and tells you the exact moment to open or close your windows for free passive cooling.
Thresho knows when the evening Delta breeze arrives and tells you the moment to open up, before your rooms heat back up.
When local air quality is poor, it holds the open-windows alert, so you are never invited to let bad air in.
No account, no servers. It runs on your iPhone. Your location and your rules never leave your device.
Built for California iPhone owners who want a cooler home without running the AC. Nothing to buy, nothing to install in your house.
Drop your email below. Tell us you're on an iPhone in California and we'll add you to the next batch.
We send an invite by email with a TestFlight link. You'll need Apple's free TestFlight app.
Install Thresho and put it to work. Thresho isn't on the App Store yet, the beta runs until it is.
A small, private TestFlight group for California iPhone owners. Drop your email and we'll send your invite.
We'll only use your email to send your TestFlight invite. Invites arrive with a TestFlight link, you'll need Apple's free TestFlight app.
California · iPhone · free · no account