Of course, in order to send the postcards you'll have to spend real money, so keep in mind that although the app is free, if you want the postcards you create to get to their destination, you'll have to pay for it (which seems reasonable, really).
The options for creating postcards are quite simple, so it's easy to put them together. You choose a photo from your gallery, adjust it, write the text you want to appear, and once you've finished, confirm that you want to send it. This phase of creation can be carried out even when you aren't connected to the internet.
Touchnote Postcards is a very interesting app that lets you make some really wonderful gifts for your loved ones. Because of course, while emails are great, a nice postcard that you can hold in your hand trumps all.