GTalk, Gmail Chat, and Hangouts are all the same thing, and Google Voice works seamlessly through Hangouts. Android Messages is just an SMS app, it's no differe

GTalk, Gmail Chat, and Hangouts are all the same thing, and Google Voice works seamlessly through Hangouts. Android Messages is just an SMS app, it's no different from iMessage with the "iMessage" feature turned off. They were almost there until they released Allo and Duo instead of just refining their existing product.