A height-adjustable support apparatus supports items above a user's lap while seated or reclining. The apparatus includes a bottom panel with optional pillow for resting on a seated user's lap, a top panel with upright rests configured to support items (such as electronic devices) at a desired angle of use, a four-bar linkage for moving the top panel between height-adjusted positions while maintaining a same horizontal orientation, and a lock engaging slots in the bottom panel for fixing a selected height-adjusted position of the top panel. Rests on the top panel are made of bent wire and can be selectively pivoted to upright positions for supporting devices, such as a cell phone, tablet computers, books, game displays, etc. A cup holder engages a rest on the top panel to support either a handled container (such as a mug) or no-handle container (such as a soda can).