Amazon's Alexa won Christmas this year (AMZN)

Amazon's Alexa app was the top app for Android and iPhone on Christmas day. It's a strong indication that Amazon's Echo products were a popular gifts this year. Amazon doesn't disclose device sales, but said in a press release that “Amazon Devices also had its best holiday yet, with tens of millions of Alexa-enabled devices sold worldwide.” Amazon won Christmas this year. The Alexa app, which is required to set up Amazon's Echo devices and other products with the Alexa digital...