Efemr already allows you to control how long your Public Tweets stay visible on Twitter.
NOW you can send Private Self-Destructing Direct Messages and Photos.
NEW! No more 140 character limit on Twitter DM!
Just connect to your Twitter account and add a Minute/Hour/Day Hashtag
e.g. #5m for 5mn, or #3h for 3 hour, #1d for 1 day, etc… depending on how long you want
your tweet to stay visible.