Best Buy gave owners of its Rocketboost wireless audio system a way to steer it independently with both desktop and mobile apps. Both a Windows controller (above) and an iOS app (free, App Store) let users pipe audio from a Rocketboost host device to any Rocketboost audio system on the same local network, including Insignia TVs and soundbars. It lets users mix and match sources and destinations, also giving them a signal strength for each device to give a hint of how reliably it will play.