[Zubersoft]

What Android OS version are you using with LineageOS? MobileSheetsPro does not run as a service, so it can't be configured itself to automatically launch at startup. Another service could potentially try to run the app (I imagine that's what those apps you tried are supposed to do). This post has information on how a service can be set up to run, and then respond to the boot complete notification to do something like attempt to load an application: https://stackoverflow.com/questions/6391...on-startup

Unfortunately, I can't really provide any more support than that as I don't have any previous experience with trying to do this, and it's not something MobileSheetsPro can do itself.

Mike