An adjustable portable device holder (100, 200) comprising: an adjustable clamping element (102, 202) that can be expanded and retracted to secure portable electronic devices of different sizes to the adjustable portable device holder (100, 200); the adjustable clamping element including a compression or torsion spring that facilitates expansion and retraction of the adjustable clamping element (102, 202) upon applying or releasing a force on a surface of the adjustable clamping element (102, 202); a rotatable mounting element (104, 204) attached to the adjustable clamping element (102, 202), characterized in that; the rotatable mounting element (104, 204) including a base plate (106, 206) and a plurality of mounting arms (108, 208) extending from the base plate (106, 206); the base plate (106, 206) providing a rotating platform from which the mounting arms (106, 208) extend; the mounting arms (108, 208) spaced a distance apart relative to one another and extending from the base plate (106, 206) at an angle relative to the base plate (106, 206), and defining a mounting slot (110, 112, 210, 212) between the mounting arms (108, 208); the mounting slot (110, 112, 210, 212) between the mounting arms (108, 208) configured to engage and attach to an automobile air conditioner vent blade to mount the adjustable portable device holder (100, 200); and the mounting arms of the rotatable mounting element (104, 204) including a gripping material on a gripping surface of the mounting arms to increase an adhesion, grip or coefficient of friction between the gripping surface of mounting arms (108, 208) and an automobile air conditioner vent blade secured within the mounting slot (110, 112, 210, 212) between the mounting arms (108, 208). an adjustable clamping element (102, 202) that can be expanded and retracted to secure portable electronic devices of different sizes to the adjustable portable device holder (100, 200); the adjustable clamping element including a compression or torsion spring that facilitates expansion and retraction of the adjustable clamping element (102, 202) upon applying or releasing a force on a surface of the adjustable clamping element (102, 202); a rotatable mounting element (104, 204) attached to the adjustable clamping element (102, 202), characterized in that; the rotatable mounting element (104, 204) including a base plate (106, 206) and a plurality of mounting arms (108, 208) extending from the base plate (106, 206); the base plate (106, 206) providing a rotating platform from which the mounting arms (106, 208) extend; the mounting arms (108, 208) spaced a distance apart relative to one another and extending from the base plate (106, 206) at an angle relative to the base plate (106, 206), and defining a mounting slot (110, 112, 210, 212) between the mounting arms (108, 208); the mounting slot (110, 112, 210, 212) between the mounting arms (108, 208) configured to engage and attach to an automobile air conditioner vent blade to mount the adjustable portable device holder (100, 200); and the mounting arms of the rotatable mounting element (104, 204) including a gripping material on a gripping surface of the mounting arms to increase an adhesion, grip or coefficient of friction between the gripping surface of mounting arms (108, 208) and an automobile air conditioner vent blade secured within the mounting slot (110, 112, 210, 212) between the mounting arms (108, 208).