90% of Twitter Users Use Official Twitter Apps...Maybe

Twitter reports that 90% of users use official Twitter apps on a monthly basis. Sysomos disputes this fact by analyzing over 25 million tweets posted on March 11, 2011. Their data reflects that official Twitter apps accounted for only 58% while non-official Twitter apps accounted for 42%. A breakdown of market share of non-official Twitter apps:

Twitter Clients

• 16.4% Ubersocial 
• 13.1% TweetDeck
• 9.2% Echofon
• 1.8% Twidroyd

Syndication

• 5.2% TwitterFeed
• 3.4% KetaiWeb
• 3.3% Tweet Caster
• 3% Twipple
• 2.4% Hoot Suite
• 2.3% Tumblr
• 2.2% dlvr.it
• 2.1% Snaptu
• 1.8% Plume
• 1.6% movatwi.jp

Other

• 27.4% Other

One of the comments left on the Sysomos blog mentioned that possibly Twitter was stating that users were using an official Twitter app at least once a month. Since Sysomos data is a one day snapshot it would be interesting to look at the data in monthly aggregate to see if indeed the 90% stat is true.