ARCHIVES: This is legacy content from before Marketing Dive acquired Mobile Marketer in early 2017. Some information, such as publication dates, may not have migrated over. Check out the new Marketing Dive site for the latest marketing news.

Mobile Minutes: Facebook Messenger; Apple buys Emotient; Smartphone passports; Smartphones evolve

Facebook Inc's Messenger app surpassed 800 million users, the company said on Thursday, making it the fastest-growing app of 2015 according to research firm Nielsen.

Apple Inc. has purchased Emotient Inc., a startup that uses artificial-intelligence technology to read people?s emotions by analyzing facial expressions.

An Austrian passport-maker in business for 200 years says it is ready to put vital identity documents on that most personal of devices - the smartphone.

While many consumers may be satisfied with their current devices,BlackBerry's CEO told CNBC that he believes there is still another leg of growth ahead for phones.