I saw the same message while editing the app and posted a query (now deleted).
Your reply doesnt explain the message. We are on a per app plan (Publisher Plus). We are fine with not requiring user sign-in.
Will the function be retired/made obsolete on Jan 20th? Why? Our app uses the function.
It seems to me that you suck people in to using AppSheet to make apps on freemium or low cost plans, but then change functionality/features to force them on to higher paying plans (STANDARD or PREMIUM).
Another example of this is the ability of the app-maker to copy textually the app definition to see the difference between versions of the app. I posted in the community about this (15 weeks ago) and the response I got was that this type of functionality is on more expensive plans, but you would think about similar functionality for other plans (see your reply below):
"Hi @Lauro_de_Freitas, I understand the ask. It would be at the “definition” level since there isn’t actually any “code” generated per app.
It sounds like the app update functionality is what you want, but you aren’t using it because of the plan you are on.
We provide some kind of diff in the version history but it isn’t very readable. Also when there are very large differences between versions, they are not captured.
Internally, yes we can do a diff. We need to find a meaningful way to expose this to users."
I recommended AppSheet to two other units outside our charity unit, but this, along with other things is making me rethink this.