Twitter has updated its mobile apps for both iPhone and Android. The updated app can now be downloaded at the Apple App Store or at Google Play. The announcement came from Twitter Product Manager Sung Hu Kim in a post at the Twitter blog. Kim states the apps now feature improved discover, search, and notifications.

The “Discover” tab in the app now allows users to see “Activity” on Twitter. “Activity,” Kim wrote is, “a stream of updates that shows which Tweets are favorited or retweeted by the people you follow and which accounts those people follow or add to lists.” From Kim’s blog post:

Activity appears below the redesigned stories in Discover. Now you can tap any story once to see Tweets about a particular trend or news article. You can then read the entire story or join the conversation by replying, retweeting or favoriting related Tweets.

The search function will now correct spelling and suggest terms related to a search. It will also autocomplete the names of people you follow when you begin typing them into the search box.

Notifications got what is arguably the biggest change. Notifications for interactions are now push notifications. This means user’s won’t have to wait for their app to refresh to receive notifications for their retweets, follows, or direct messages. Users can now choose to have notifications happen instantly.

Some interesting incremental changes for mobile apps. What do you think? Do you use the Twitter app or some other app, such as Seesmic? Leave a comment and let us know.