Echofon Pro works both iPhone and iPad!
Echofon is an easy to use, super-fast Twitter app for the iPhone and
iPod Touch. This pro version works on iPad too!
It is easy to do common Twitter tasks such as viewing your timeline,
messages, replies, lists and favorites. Echofon has a powerful
tweet-authoring where you can write tweets, take photos/videos and
update your current location.
When another Echofon user (iPhone or desktop) sends you a Direct
Message or @reply, you can be notified instantly via push
notification. Get your friends to use Echofon and you can send Twitter
messages instead of SMS! You also can receive push notifications from
users of other Twitter apps with this pro version.