Postfun is a mobile application for exchanging postcards worldwide.

This is a free app and has no in-app purchases or ads. It's a simple way to send real postcards to your friends and family and receive them in the mail from other random people around the world.

Postfun is a free app that is available on iOS and Android. You can send and receive up to five postcards per day. There is no limit on the amount of stamps you can use.

The app will let you send a card to anyone with an email address. There is no registration required. Just sign up with your email address and choose a Postcard ID.