App know-it-all Stuart Dredge returns to talk you through some of the best bits out this week:
Habu Music
Habu Music is the latest smartphone and tablet app promising to help you discover new, amazing music. Its twist: the music is presented by mood, with playlists based on things like 'sensual', 'peaceful', 'cool' and 'rowdy'.
Indie Shuffle
This is another 'smart playlists' app that aims to serve up new music, but this time based on the popular Indie Shuffle website. Choose a song in genres like indie rock, hip-hop and electronic, hit play, and enjoy (in theory) a stream of goodness.
John Cage Piano
Celebrate the 100th birthday of composer John Cage by playing a virtual version of his 'prepared' piano - basically this involved putting a load of old metal bits and bobs under his piano's strings to "create an entirely new instrument". And now you can do it on an iPad with no nails or bolts required.