Here is an iPhone mount that lets you exercise with your phone more easily. The Belkin Fitness Mount with MagSafe is made for indoor cycling, treadmills, spin bikes, and elliptical machines. It works with MagSafe cases up to 3mm in thickness.
This mount attaches to magnetic gym equipment and surfaces in a flash. You can also use the included strap to secure your iPhone 12 to handlebars and poles from 1 to 1.5″ in diameter. The Belkin iPhone 12 Exercise Machine Mount has a ball joint that allows 360-degree rotation.[where to get it]