Can you edit schedules directly on the thermostat? From what I recall, much of the functionality required the app. That can’t be used now.

If you’re only using it as an analog dial to set the temperature, you won’t miss anything. However the majority of functionality is now gone from the devices.

Edit to mention that I was out of town one winter and my thermostat gave me an alert that my apartment had reached 40F! With my cats in there and a blizzard happening while I was four states away, I was able to ask a friend to walk over and check it out. Turns out my balcony doors had blown open during the storm, thankfully my cats wanted nothing to do with the snowy outside but I can’t imagine if they had been in that situation for the 3-4 days it would be before I got home.

If you'd bought it for hundreds of dollars for the things it promised to do, you'd probably be much more excited to learn that you at least aren't stuck with a device that was made intentionally dumb by the manufacturer. They're perfectly capable of doing what they were designed to do!