Monopolies are not based on the profit but market share. Yes Apple has a very profitable niche but that does not mean Android does not have a near-monopoly on smartphones.
No, a monopoly is controlling a market to the point where competition is restricted via controlling supply or other means. A company can have 100% market share and not be a monopoly (which is always what happens when a new market emerges).
(Not OP:) In theory I agree. As soon as you have IPR like patents and copyright that are protecting the new product then you're inhibiting access for other companies; that is probably the case in a lot of new markets.
