Techibble via Amazon offers the Ramkon Universal Air Vent Smartphone Car Mount for $12.99. Coupon code "TAA6IOE6" cuts the price to $4.99. Plus, Prime members qualify for free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.10.) That's $15 off and the lowest total price we could find. It's compatible with most smartphones, including iPhone 6, Galaxy S6, and HTC M9.