Compare is an ad-free application and open source application.

It gives you the power of comparing two pictures by giving you the flexibility of putting them both on one screen .You can rotate, pan and zoom the pictures and share them with other applications.

In a nutshell it helps you decide

#Which dress looks better on you when you are shopping for clothes, going out for party or work.

#Which photo is good enough to be mailed or shared.

#Added Merging two photos into one

#Ability to paint/draw on merged photos

We would love to hear your feed-backs and incorporate changes in future releases.

Note: It's an open source project which you can modify as per your requirement.
http://deadmango.com/index.php/archives/1760

Screenshots: