Oh, how did I miss this? Yes, of course! 
Oh, no! It's free to all. And sorry I ignored that previous Tweet... I totally missed it! 
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Oh, no! It's free to all. And sorry I ignored that previous Tweet... I totally missed it! 