Apparently it should cost makers an extra $10 to $40 per phone, depending on resolution of the screen (I'm sure there's a logical reason, really). I've been using duck-duck-go for a while on my phone, and prefer its speed over conventional google.
Why is it faster than google? That's a very good question, that a measure of paranoia may provide an answer to.
I've also replaced Chrome with Brave browser, which works well for an advertising blocker like me.