DokiDoki Postbox is a social communication app developed by GRANDMASTER SOFTWARE for Android users. The app allows users to connect with people from all over the world without requiring any personal information. With over 3 million downloads, DokiDoki Postbox has become a popular choice for those looking to make new friends.

One of the key features of DokiDoki Postbox is the ability to exchange messages with people from any part of the world. Users can simply select 'World' when sending a message, and it will be delivered to anyone, anywhere. The app also comes with a free translation system, making it easy to communicate with people who speak different languages. Additionally, DokiDoki Postbox supports English, Korean, Japanese, and Chinese languages.

Apart from these features, the app also has a slang filter and push notifications that let users know when they receive a message. DokiDoki Postbox is a great way to meet new people and has been ranked 1st in the Korean Apple App Store and 2nd in the Japanese Apple App Store.