Two powerful voice recognition systems in widespread use today are Apple Siri and Amazon Alexa.  Both offers fast, accurate recognition that is very useful in everyday use.

Google Assistant is the new kid in block. The Google Assistant on Pixel phone, Google Home speaker, and Android devices is only available in select regions.

Apple Siri is an app that works as an artificial intelligent (AI) personal assistant in Apple iPhones, iPads, Apple Watches, Apple TVs and Macs.  It can organize and manage emails, calendar events,  to-do lists, play music and control smart home devices.

Amazon Alexa is an AI app  that play music, movies, control your smart home, get information, news, weather using just your voice.