I found that this app has a really good interface and has a great deal of data for each element. Not only this but each element has a wiki and webelements section (which I assume can be viewed offline) for finding out a little more info on each if desired. The graphs are useful for visualizing trends and seeing how the physical property of one element compares to others quickly.
My only problem with this app, though minor, is sometimes the webelements and wiki page loads slow, however this only sometimes happened when loading them the first time after opening the app.
Bonus marks to the sweet icon! One of the best Ive seen. Placed it on my homepage just because of its looks :)
dyn85 about EleMints: Periodic Table