Urban Mobility Prototype with Smartphone Connectivity

I am building a compact personal-mobility device intended for everyday use in dense urban areas. The core requirement is seamless smartphone connectivity: riders should be able to pair their phones quickly, view key ride data, and handle basic controls through an app... (Budget: $250 - $750 USD, Jobs: Audit, Bluetooth, CAD / SolidWorks, Electronics, Embedded Systems, Excel, ISO9001, Mobile App Development, Product Design, Safety Consulting)