Last week Twitter announced changes to its API rules concerning Twitter client apps. To determine usage of different Twitter clients,
Sysomos reviewed a sample of 25 million tweets on March 11 – the day Twitter unveiled its new API policy. The data shows that 42% of tweets were made by non-officials apps – more than four times the amount claimed by Twitter. UberSocial and TweetDeck continue to be the two largest non-official app used to post tweets.