As an adjunct to my recent spate of supporting mobile device contexts using Browscap, and as a compliment to the recently released Browscap CTools module, I knocked out a similar module for hiding and showing Drupal blocks in mobile - Browscap Block.

This module leverages Browscap for device detection and requires it as a dependency.

Its dead simple to use, just enable like any other module then visit a block configuration and you will see new visibility settings for mobile.