Pierre Legrain, a previous Twitter Engineer has created an app that allows you to add expiry dates to your tweets. Spirit allows you to simply add a hashtag to your tweet which will schedule it for deletion, for example: #30m or 2d or #3h.
A great use of this service would be for expiring coupon codes, promotions or notices which need to be removed after a certain period of time to stop confusion. It could also be used as a Snapchat alternative…. but for Twitter.
You’ll first need to enable the service on it’s website – http://twitterspirit.com/. Once enabled, you can tweet away with the hashtags and they’ll be automatically deleted!
Source: The Verge