This app is responsible for managing ringtones on Firefox OS. There are three entry points into the ringtones app:

Located in manage.html, ringtone management can be accessed from Settings -> Sound -> Manage Ringtones. This lists all ringtones (built-in and user-created), and allows deleting or sharing them as appropriate. You can also create new ringtones, which will initiate a 'pick' activity and then effectively open the ringtone app's 'share' activity.

Located in pick.html, this allows other apps to choose a ringtone. Notably, this is used in the Settings app under Settings -> Sound -> Ringer and Settings -> Sound -> Alert Tone. The pick activity expects a type of 'ringtone' or 'alerttone'; whichever type is requested will be shown first in the list. After that, we show custom ringtones, and then ringtones of unasked-for types.

Located in share.html, this allows other apps to create a new ringtone. This is also used in reverse to finalize creation of a ringtone from the ringtones management screen.