Astrid comes to iPhone so more people can get things done

Astrid, the web and mobile application that allows users to create to-do lists with social features, has finally debuted a version of its app for the iPhone.

The iOS(s AAPL) launch comes three months after Astrid raised an undisclosed amount of funding from Google Ventures and Nexus Venture Partners.

Astrid is already very popular on the Android platform on which it originated last year: The app has been downloaded more than 2.5 million times in the Android marketplace in the 15 months since it launched, having gained traction with a range of users from multi-tasking parents to power-using “life hacker” types. As we’ve written before, Astrid’s mobile app allows users to make to-do lists and share them with certain individuals or groups of people. Astrid lists can also be made entirely public, or completely private.

The app’s aim, Astrid co-founder Jon Paris says, is to help users get more things done through a healthy amount of social pressure. For example, my friends can give me a hard time if they see I haven’t gone to the gym this week like I planned to (a purely hypothetical situation, of course). Now that Astrid has crossed the iOS launch off its own to-do list, it will be interesting to see what the company does next.

Here are some screen shots of Astrid for iPhone (click to enlarge):