(Telecompaper) Over 8.73 million Dutch had the messaging app WhatsApp installed on their smartphones in September 2014, over 1 million more installs than one year ago. The number of downloads of Facebook Messenger more than doubled during this period. In September 2013 over 1.72 million smartphone users downloaded this messaging app, growing to 3.73 million twelve months later according to Telecompaper's quarterly Dutch Apps Market report.