Using and Building Mobile Assistants

The idea has been around for some time, and mostly publicly with the Apple Siri.  A mobile assistant. Now more recently have found myself using them more freqently.    All using natural language processing, sensor data and AI logic. See also Microsoft's Cortana, and the similarly named Cognea.   " ... Cognea has an artificial intelligence platform to give a human-level brain to virtual agents, to create personal assistants, coaches, companions, and employees. ... "