Very cute and effective

You will meet a LOT of Koreans. Occasionally a postcard comes from Japan and once a blue moon, youll meet someone from Australia, Africa, a Chinese speaking country, etc.
Problems: 1) the app crashes and refuses to open if Im on an open wifi network, 2) the translator feature for Japanese is terrible, 3) Ive received postcards from the same guy (domestic) at least five times.. there cant be that few USA users right?

Moo cakes about DokiDokiPostbox