the short answer is no. "logged in" is a hard thing -- you can tell the last time a user tweeted by looking at the time stamp of the status update, however, as people can consume tweets on a variety of places (the web, API clients, third parties, etc.), its hard to define "logged in".
as for what application was used last, i would look at what is the source field of the last tweet the user sent. On Sat, Dec 19, 2009 at 2:32 AM, Gaurav Shaha <gauravshah...@gmail.com>wrote: > Is there any way for which we can get when user was last logged in?? > And also i want to check weather specified user is any application such as > TweetMeme, Seesmic, CoTweet, Google Wave, etc. > > > Thank you in advance. > -- > Warm Regards, > Gaurav Shaha > 9823359549. > > > "Don't try to show off, just be youself and do what you ENJOY doing...." > -- Raffi Krikorian Twitter Platform Team http://twitter.com/raffi