This morning Twitter announced that it has 100 million active users logging in at least once a month and 50 million active users every day. This isn’t a huge surprise seeing as the microblogging service has a total of 200 million registered users, however it does show that the service is becoming more popular to use on a regular basis.

In the press conference this morning the CEO Dick Costolo offered a whole raft of statistics to prove that Twitter is healthy and growing like a weed — especially on mobile platforms. Some 55 million users log on to Twitter from their phone or tablet every month. Web-based users are on the rise, too: Twitter.com now sees 400 million visitors a month, up from 250 million at the beginning of the year, Costolo says.