Google Duo by Google
Of the two communication apps that Google announced at I/O, Duo surely seemed like the less interesting one. Video calls have been done again and again, and by now, if you have someone you want to talk to and see at the same time, odds are you already have your preferred way of doing that.
Google Allo by Google
Allo’s standout feature is Google Assistant, which is basically a bot you can chat with that uses Google’s vast search database to answer several kinds of questions you throw its way. For example, you can type, “Cafes nearby?” and it will find popular coffee shops in your area (just make sure you have location turned on). You can ask it to translate phrases in different languages, show your latest emails, look up airfare prices and other common queries.