The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Sea To Software:
Stampie is a unique and fun app to create one of a kind selfie postcards. Just take a picture of something beautiful. Stampie then takes a picture of your smiling face with the front-facing camera, and makes a postage stamp out of that picture! It will even "stamp" your postcard with the name of your city and the today's date!You can share the postcards with your friends on Facebook and Twitter, email them, and save them to your photo library. There is no post office involved!