My partner has an Anovo affected by this and he knows the details better than me, but IIRC the app allows you to set times to change temps or things like that. The device still works without the app, but you lose the convenience factor of being able to monitor or make changes at a distance.
My dad wrote software in the 90s and developed a pretty good name for his business. He once got a call from Microsoft saying they wanted to package his software in their newest OS builds. Holy crap, right?! That would be a major break!
They told him they needed to do some deep interviews to set the plan in motion. I can’t remember if there were supposed to be 4 calls total or if it was on the 4th call, but after a couple conversations my dad realized the questions they were asking were to reverse engineer his software. They were never trying to make a deal; they were trying to learn what they could so they could rewrite it and not pay him a dime. He told them to pound sand.
There were a few other conflicts he had with Microsoft. I was young and didn’t understand it well, but my whole childhood I knew Bill Gates led a shady as fuck company and thought he was an awful POS. It honestly still kills me to admit that he (now) does some good in this world.