I have a new feature in our iOS app, where we are uplifting user data from their device to the cloud. The process could take up to a minute, or 2 mins as an absolute extreme case.
A use case is that a user has two devices running our app and on one device they are in the process of the cloud uplift, and on the other, they open our app.
I want the second device to show an alert (or whatever notification makes sense) to essentially block the user from using the app, because the other device is being uplifted to the cloud.
After the process on the first device is complete, the second device would resume as normal.
Has anyone ever seen an alert that is not dismissible or experienced this in the past where the app simply goes into a dormant stage with a message saying you can't use this app until the other device has finished completing a process?
I'm assuming it'll be an alert with no buttons. Is there a better experience I could use or is this what a user would expect?
Thanks in advance.