The best alternatives to ParkSocially for iOS are Luxe Valet, Strikingly, and Blucar. If these 3 options don't work for you, we've listed a few more alternatives below.
Strikingly is a website builder that allows the user, with little or no development experience, to create mobile optimized websites “within minutes”. The company takes a mobile-first approach, allowing users to create websites that are enhanced for viewing across all devices including desktops, tablets, and smartphones.