MicDroid

If you've been waiting for the iPhone's famous I Am T-Pain app to make it to Android, you should try out MicDroid!
Always sing in tune!
Offers plenty of options for pitch correction!
Reproduce the pitch correction effects you hear in music yourself!

Features:
-Automatic pitch-correction
-On-the-fly pitch correction
-Email recordings
-Set recordings as ringtone
-Disable/enable ads in settings

Still BETA quality software, so please report errors to the developer!

Source code available at http://www.github.com/intervigilium

Graphics courtesy of
http://pengxwang.com

A Google User
Awesome app XD All you people leaving bad reviews need to get a new phone like it suggest farther down in the comments, and spend more time with electronics in general. This does exactly what it told you it was going to do in the description.
Rated: 5 Star

A Google User
The app is great! Don't listen to all those bad reviews. They just don't have their settings setup right. But when you do get them set up right, it sounds amazing. Something you guys could add though is a way to setup saved recordings as alarms too. Thank you for the awesome app!
Rated: 5 Star

A Google User
Wish voice would chqnge :( I mean it dose but it dont sound good it sounds2 fake u know it well gess if I relly dident like it I would get rid of it
Rated: 3 Star

A Google User
It's really fun and cool when I'm bored. But the sucky thing is that it gives me the option to share the recording by sms, but when I click on it, it doesn't show up.:( please fix.
Rated: 3 Star

Ross Reynolds
I love how fully featured this software is compared to the actual Auto-Tune plugin (I'm a producer), but all that's pointless since the app doesn't work on my Galaxy S III! It says something about me needing a mic for it to work; why can't it use my phone's mic? Fix this and you get 5 stars.
Rated: 2 Star

A Google User
No problems, evo 3d... This program processes wav files... Don't expect much if your using terrible hardware. As I suspect many bad reviewers are... And for christ sake, write something worthwhile in your reviews... Followed by your specific phone model.
Rated: 5 Star