Daily Postcard is a free Android app developed by GH PLANET Inc. that lets you send and receive postcards from people around the world. The app features Post Birds that deliver your postcards, adding a unique touch to the experience. With Daily Postcard, you can select a picture from the default gallery or choose your own to decorate your postcard and send it to your friends. You can also introduce yourself to other users via voice and find new friends with similar interests or from different nationalities, age groups, and genders.

The app also offers a free translating function that makes it easy to read postcard messages in your own language. You can keep selected postcards from your friends or the ones with fancy pictures, and a filtering function helps you block receiving postcards that you no longer want to receive. However, filtering will not block postcards from your own senders or replies. Additionally, you can set a time for the Do-Not-Disturb-Me feature to turn off postcard receiving alarms.

Overall, Daily Postcard is a unique and fun way to send and receive postcards from around the world. The app requires access to your camera and external storage to take pictures for postcards and save photos, respectively, as well as access to record audio to create voice profiles.