APP-link is a free Android application developed by SPower that enables users to control the radio host from their mobile phone. This multimedia app offers a variety of modes including radio, USB, AUX, and Bluetooth, allowing users to play music and adjust settings with ease. The app provides a convenient way to scan, store, and adjust radio frequencies, while USB mode enables users to play music directly from their USB and displays ID3 tag information. AUX mode allows users to connect external audio input to the host. The app also allows users to play BT music and display ID3 information via Bluetooth control. With Play/Pause/Previous/Next Control and Fader/Balance/10EQ Band Level Control features, users can adjust the audio settings to their liking.