On iPhone: open this page in Safari, use Share → Add to Home Screen, then open Housewatch from its new icon and enable notifications. On Android: enable notifications here; you can also add Housewatch to your Home Screen.

If notifications are blocked, allow them for Housewatch in your browser or phone settings, then reopen this page. Allow Housewatch in your phone’s notification and Focus settings. Send a test notification, close the app and lock the screen to check that alerts appear.