「咕咕」一個用來與外國朋友交換明信片的應用程式，藉由培育一隻咕咕鴿來協助我們與國外朋友交流明信片，藉由傳統飛鴿傳書的形象來傳達的寄信感受，不再像是平常電子信箱快速的傳送，所以試著慢慢地準備自己的明信片，讓他人期待你新的明信片到來。

Coocoo APP is used for exchange postcards with international strangers. You need to keep a coobird to help you send your postcards around the world. We’re bringing the traditional sending experience to your smartphone. The postcards take time to be delivered. So don’t rush through preparing, just make postcard be worth the wait.