I’ve been using Telegram daily after I posted about how much I like it. Its
latest update brings a handy new feature, if you use their “secret chat” option which doesn’t store the conversation on their servers you can now also set the conversation to self-destruct in as fast as 2 seconds or as long as 1 week. The conversation will be deleted from both devices.
Update: Feature has been there for awhile, still a great feature nonetheless.