A pocket probably the back right pocket if you are right handed and the left pocket if you are left handed. If you are under the age of 75 start using apps on your phone and spend the money on anything else on beverages on the course.
It holds my phone in my back right pocket, while I use TheGrint and also the paper scorecard and a pencil. All exactly how I wanted it for $100 + shipping, and custom made by an Ag to my specific asks.