Most of the folks I know locally who have the Quad Lock say they started with other mounts and wish they'd gone straight to the Quad Lock.

I've checked a few inexpensive mounts but most of the secure mounts and those that come with weatherproof containers are designed to fit threadless stems. My bikes have quill stems.

I just start my cycling apps and keep the phone in a small handlebar bag until I need to check the maps or other stuff. When I mount my larger AGU handlebar bag I put the phone in the waterproof map pouch on the top, since it allows operating touch screens too. But I don't pay much attention to the screen while I'm riding. Usually I prefer to find out later how my conditioning is progressing or regressing.