Taking the digital 'cloud' analogy quite literally, Air France have recently released a new app which allows users to unlock musical tracks hidden in the sky. The app, Music in the Sky, uses geo-location technology to reveal invisible songs for download when users point their phone in the air.

Created by agency BETC Music, the app allows users to download current tracks and previously unreleased material from artists such as Eugene McGuinness and Villagers.

With Air France already offering bespoke music playlists on their flights, this is an interesting development which engages and rewards their customers back on the ground. Like _Scape, it's interesting to see airlines going one step further with their services. Check out the video above for more info.