Slowly, Google is bringing its Allo chat app's basic functionality up to speed with the likes of iMessage and Telegram. The application's latest update adds the encrypted incognito mode to group chats (previously it was only available in one-on-one conversations). As Droid Life notes, you can even set an expiration timer for when your conversation goes out of incognito mode. Then there are link previews, which many other chat apps have had for awhile now. But hey, having Assistant in your chats from the get-go was impressive, right?