Here's how you can download the official Twitter app free for your Android device.
1. Go to the Google Play page for the free app Twitter.
2. Tap the Install button.
Here's a description of Twitter:
"Wherever you are, Twitter brings you closer.
Essential: An organized stream of Tweets that delivers the best content to you.
Instant: All the media, news, events, and information you need.
Personal: Your world, expressed in Tweets and photos.
Search in real time. Follow people you’d like to know. Watch rising trends."