FS Music Player

Offline music player, compatible with Family Setup watches. My kids wanted a way to play their favorite songs they own on their Apple Watch, but the built-in music player only allows Apple Music streaming. This app can load music you own, initially downloaded via https and play through Bluetooth audio in the background. This also lets the parent more closely control the music that their child listens to.
Also includes a PIN-lock feature to prevent children from accidentally deleting music from their watch.