I like to watch TV while on the elliptical machine at the gym. The shelf that's built into the machine has the phone too low and I have to look down at it to watch. This brings my phone up to eye level with a mount that hooks onto the top of the machine.
Print this on its side and it should come out nicely.
This fits the particular elliptical machine that my gym has. It's not intended as a general purpose model. See the original CAD in Onshape that's linked below to make adjustments to fit other machines.
This is made to fit my phone and case pretty tightly for it to be stable while mounted. Some adjustments are probably needed to get it to fit other phones. See the original model link where it can be adjusted to fit your needs.
The author marked this model as their own original creation.