A year ago I found an iphone 6 plus holder on here and I sorta liked the design but not enough to use it. I re-made it in Sketchup with some modified dimensions and with holes to mount to a standard RAM style ball mount. Since then I've had it on my longboard, bike, anywhere I can put another ram mount. Today I realized I can strap it on my wrist face down and use it for Pokemon Go in battery save mode and stay hands-free. With long sleeves you might not even look like a tool.
50% if it's going on a motorcycle, 20% otherwise.