Why do you keep talking about who installs the app? That has nothing to do with whether something is a monopoly, which is primarily about market share.
If a user is openly going out of their way to go and install a competitor's product despite a perfectly serviceable version coming by default, how can the the one being sought out be seen as a monopoly? The competition came pre-installed!
How did the user manage to install Chrome on Windows if Chrome is a monopoly, the only serviceable browser around? They copy the source code from a magazine or something? Get a floppy disk in the mail?
If a user is openly going out of their way to go and install a competitor's product despite a perfectly serviceable version coming by default, how can the the one being sought out be seen as a monopoly? The competition came pre-installed!
How did the user manage to install Chrome on Windows if Chrome is a monopoly, the only serviceable browser around? They copy the source code from a magazine or something? Get a floppy disk in the mail?