Unsure if you should be celebrating Valentines this year? Frankie Midnight Private Investigator may be able to help. Using a film-noir style, the online detective checks your Facebook page and delivers a report based on interactions with your ‘loved’ one.

The innovative campaign from Isobar Mobile and out of home agency, Posterscope makes clever use of outdoor, QR codes, HTML5 and Facebook’s api to create an engaging mobile-based experience. With the posters appearing in over 300 sites around the UK, it is a great demonstration of how mobile can bring together different media to create one engaging campaign. You can either find Frankie PI by scanning the code on the posters, via Twitter #Frankiepi_14, or alternatively simply point your mobile browser to doesheluv.me or doessheluv.me .