On all mobile devices, different "gestures" can be applied using one or two fingers to execute different commands on the map.
Tap with one finger to get Quick info

Pinch two fingers in to Zoom out
Pinch two fingers out to Zoom in

Double tap with one finger to Zoom in

Double tap with two finger to Zoom out

Swipe up/down to enable/disable Perspective view

Move with two fingers to Rotate the map
