I assume they will require an account of some sort, and their DB will inevitably be breached to leak it who knows where. It knows more about me than my location. Probably. I don't know what all the proprietary software running on my portable sensor suite does or knows.

And almost without fail corporate one-off apps are bloated piles of contracted out and barely maintained garbage taking up too much space when a couple of forms and a few Mb of graphics/logos would do. Lastly very few actually work well or reliably, logging me out after needless updates seems to be a common pattern.

It's probably not a problem in a place like that with some kind of privacy regulation. Import the concept to the US and it'll be outsourced to some company with sketchy security that'll find all its user data leaked in a year because they'll face no social, economic, or legal consequences for not preventing it. If they're not selling the data themselves.