An adjustable portable device holder (100; 200) for mounting a portable device to a mounting surface by positioning, press fitting or wedging the mounting surface within a mounting slot (110,112; 210, 212) of the portable device holder (100; 200), the portable device holder (100; 200) comprising: an adjustable clamping element (102; 202), wherein the adjustable clamping element (102; 202) is capable of being biased into an activated state and unbiased into a deactivated state to removably secure one of a plurality of different size portable devices to the adjustable portable device holder (100; 200); the adjustable clamping element (102; 202) comprising two side grips opposingly oriented to one another and each side grip has a device engaging surface that abuttingly engages a portable device in the activated state of the adjustable clamping element (102; 202), a rotatable mounting element (104; 204) attached to the adjustable clamping element (102; 202) by a rotary connection that permits 360 degrees clockwise and counter-clockwise rotation of the adjustable clamping element (102; 202) relative to the rotatable mounting element (104; 204); wherein the rotatable mounting element (104; 204) comprises a base plate (106; 206) forming a rotating platform and a pair of mounting arms (108; 208) extending from the base plate (106; 206), spaced a distance apart from one another and converging toward one another, the size of the mounting arms (108; 208), the distance between the mounting arms (108; 208) and the angle at which the mounting arms (108; 208) extend from the base plate (106; 206) establish and define the mounting slot (110, 112; 210, 212) between the pair of mounting arms (108; 208), wherein the rotary connection positions the mounting slot (110,112; 210, 212) in various orientations relative to the adjustable clamping element (102; 202) across an entirety of the 360 degrees of rotation; the adjustable portable device holder (100; 200) being characterized in that the two side grips linearly translate relative to one another upon transition between the activated and deactivated states of the adjustable clamping element (102; 202); and that the adjustable clamping element (102; 202) further comprising two rods, an expandable arm, a main body, and springs inserted one each over each rod and held in place by a screw affixed to an end of the respective rod. an adjustable clamping element (102; 202), wherein the adjustable clamping element (102; 202) is capable of being biased into an activated state and unbiased into a deactivated state to removably secure one of a plurality of different size portable devices to the adjustable portable device holder (100; 200); the adjustable clamping element (102; 202) comprising two side grips opposingly oriented to one another and each side grip has a device engaging surface that abuttingly engages a portable device in the activated state of the adjustable clamping element (102; 202), a rotatable mounting element (104; 204) attached to the adjustable clamping element (102; 202) by a rotary connection that permits 360 degrees clockwise and counter-clockwise rotation of the adjustable clamping element (102; 202) relative to the rotatable mounting element (104; 204); wherein the rotatable mounting element (104; 204) comprises a base plate (106; 206) forming a rotating platform and a pair of mounting arms (108; 208) extending from the base plate (106; 206), spaced a distance apart from one another and converging toward one another, the size of the mounting arms (108; 208), the distance between the mounting arms (108; 208) and the angle at which the mounting arms (108; 208) extend from the base plate (106; 206) establish and define the mounting slot (110, 112; 210, 212) between the pair of mounting arms (108; 208), wherein the rotary connection positions the mounting slot (110,112; 210, 212) in various orientations relative to the adjustable clamping element (102; 202) across an entirety of the 360 degrees of rotation; the adjustable portable device holder (100; 200) being characterized in that the two side grips linearly translate relative to one another upon transition between the activated and deactivated states of the adjustable clamping element (102; 202); and that the adjustable clamping element (102; 202) further comprising two rods, an expandable arm, a main body, and springs inserted one each over each rod and held in place by a screw affixed to an end of the respective rod.