iOttie via Amazon offers Prime members the iOttie Easy One Touch Smartphone Car Mount, model no. HLCRIO102AP, for $10.95 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.29.) That's at least $6 less than you'd spend at a local retail store. It features a suction cup, 360-degree rotation, and 1-touch mounting system. It fits most smartphones up to 2.9" wide, including the iPhone 6/6S and Galaxy S7.

Also available is the iOttie Easy One Touch XL Smartphone Car Mount, model no. HLCRIO101, for $10.95. (B&H Photo Video has it for the same price.) As above, Prime members receive free shipping. (Non-members can spend $49 or more to dodge the $6.33 shipping fee.) That's also at least $6 under what you'd expect to pay locally. It features the same specifications as the above model, but fits devices up to 3.3" wide, making it compatible with the iPhone 6/6S Plus and Galaxy Note 5.