Mobile app usage is highest among younger age groups according to Nielsen data. 17% of consumers researched holidays on mobile apps or sites according to Econsultancy, and 46% said a negative mobile experience would negatively impact a brand. In 2011 there were over 1 billion app downloads in the US along with 103 million mobile tweets per day and over 20 million 2D barcode scans in Q3. More smartphones were sold in the US than PCs. 75% of global mobile users send text messages, 46% of UK residents own smartphones, and the UK leads in mobile shopping at 10.5% for auctions and 9.2% for retail. Smartphone ownership increased in the EU5 between 2010-2011 with the UK