Snap Pen App is for the iPhone or the iPad. Very simple and easy to use.
Send directions to your friends.
Make comments on photos.
Comment on the weather....
Or create a graphic for an invitation...
Or add some copy to the cutest baby picture ever.
So easy to use. I just used my finger to write most of these. When I tried a stylus I had better control. Easy, fun and a good addition to my app library.