> Really tired of installing an app, forgetting about it,
I don't think that app can send a notification to you anyway.
An app that's never opened by the user cannot be launched programmatically and cannot run background code.
There's a difference between “never opened” and “only opened once”, and apparently the latter is sufficient to get notification spam days later. The mcdonalds app did this to me before I uninstalled it.
I don't think that app can send a notification to you anyway. An app that's never opened by the user cannot be launched programmatically and cannot run background code.