I would like to disable the access to the Web App, I just wanted them to use their phone.
You cannot restrict that, but you can create a ref type, Detail View, with 1 slide with a note that this app cannot be used in Desktop. You can design this slide as you wish. You can set an initial view expression like this to show/hide that particular view:
As an example to this kinda view:
I create a time keeping app which they need to take a photo. with the app, I can disable the Galery access, but on the web app they can open a folder that is why I want to disable the Web access.
For the Web App access on the folder can I disable it?