I mean anything you have to "install" from an app store tied to a phone OS. Sometimes if there is no other option I install the app/complete the task and uninstall.
The app guys have normalized the idea that every "bright" idea they get about how to exploit my data or waste my attention, they have a right to push it out to my phone, if I have installed their app.
So the stupid apps keep updating with new shit everyday whether I need it or not.
And that you don't ever add website bookmarks to the homescreen, because that makes them similar to apps.