Unisong

Unisong is an app that turns multiple devices connected over Wi-Fi into a synchronized, room-filling multi-speaker audio system. It supports laptops, phones, and tablets, allowing users to create a shared listening room without extra hardware. It offers free usage for up to two devices with paid lifetime licenses to enable more devices and larger setups. Playlists can be managed on desktop with iTunes integration on macOS or folder imports on macOS/Windows.