The official Twitter blog announced that Twitter has 100 million active users with half of them performing a login to Twitter on a daily basis. About 40% of people who login are information gathers who do not actively tweet out information.
One hundred million voices
TheNextWeb provides additional information about these 100 million active Twitter users. Its report notes that 55% of active Twitter users are on mobile devices.
Twitter: 100M active users per month, 50% log on every day, 55% on mobile, 1B Tweets every 5 days
This flip-flops the desktop-to-mobile tweeting relationship in less than 18 months. In April 2010, the Huffington Post reported that 37% of active users were using their phone.
Twitter User Statistics REVEALED