With an iPad quiver! It's more like a pocket that hangs off your belt, but shhhh.
I had to go through several iterations of quiver before arriving at this one, and it's still not perfect, but my friend has been successfully using it for a couple months now.
It's a pocket with twill tape straps, snap closure, and a microfiber-like lining. The earlier versions had a single channel on top for the belt to slide through, but this placed the iPad in an awkward spot, so we (meaning the owner of the quiver and I) decided on three straps instead.