Print two leg parts and one cross part, then either friction-fit them together or adhere them with glue.
Larger tablets might have their center of mass a bit too far back, which will cause the stand to fall over.
The parts are very simple shapes, so they shouldn't require any special effort to print.
You can change the angles in the solvespace file if you want it to sit at a different angle, although it might make it more likely to fall over if you use too shallow of an angle.
The author marked this model as their own original creation.