Users can use this app to send and receive serial data through Bluetooth to the Data Exchanger Bluetooth Smart (Low Energy) wireless adaptor. Features - Auto connect to Data Exchanger Bluetooth Smart (Low Energy) wireless adaptor - Transmit user typed data to the adaptor's UART output port - Display data received from the adaptor's UART input port - Round trip data transfer test for link performance monitoring Minimum iOS and device requirements - iOS 9.0 - iPhone 4s, 5, 5s, 6, 6s, 7, 8