Twitter may be the hottest kid on Wall Street with its upcoming IPO (initial public offering), but at London Fashion Week, the social media app was so last season.
Fashion giant Topshop partnered with new and relatively unknown app Chirp to interact with fans and consumers during its Spring/Summer 2014 catwalk show.
The app lets devices connect using short soundbites, which sound a little like digital birdsong or "chirping". All types of content – from photos, to notes, to weblinks – can be sent from device-to-device within seconds, using the sound.
(Read more: London Fashion Week: Is sustainability on trend?)