An anonymous reader writes: Google has officially launched their long-awaited messaging app for iOS and Android, called Google Allo. There are several unique features associated with this app that Google hopes will win you over. Smart Reply lets you respond to messages with just a tap, so you can send a quick "yup" in response to a friend asking "Are you on your way?" It will also suggest responses for photos. For example, if you send a picture of a dog, Smart Reply might suggest a heart emoji or "Super cute!" message, which you can select and send with a tap. Google says Smart Reply will improve over time and adjust to your style. You can also send large or small text and emojis, as well as draw on pictures. There's an incognito mode that will activate end-to-end encryption, discreet notifications, and message expiration on your chats. Arguably best of all is the Google Assistant that can be added to your chats to automatically cater useful information to you depending on what is being conversed in the chat. For example, it can deliver news, weather, traffic, sports or your upcoming flight status to your chat. You can also ask your Assistant to "share that funny YouTube video or play games with friends right in your group chat." Google Allo is rolling out to Android and iOS starting today.