Window open notification could tweak little bit to show which window is open on quick notification. So user doesn’t have to open app always.
or an announcement system [ smart speaker] if a window open
@Viki Get a proper hardware and build your own automation. At least it will work well and with 100% accurate readings.
I agree with @mean1979, I've had it before where I'm wondering why the room I'm in is still cold and its because its detected an open window. More often than not its not actually an open window, its just the room is cold - precisely why I've turned up the heating.
Your system will automatically return to its schedule setting at the end of the time period set in your "Open Window Detected" feature.......you can set the period for each Room to whatever timescale you want (mine are set to 15 mins). This timescale works with or without an "Auto Assist Subscription".......so your subscription simply removes the need for a "user intervention" and automatically switches the appropriate room "OFF" then returns the room to its schedule after the timescale that you have set.
I, personally only use "Auto Assist" for the winter months, and cancel my subscription at the beginning of April.......In my personal opinion, I can't see a need for the "Open Window Detected" feature, if, like me, your CH is OFF during the Summer.