✉ Now available on Android

Letters to
the World

Send handcrafted virtual postcards to real pen-pals across the globe. Experience the anticipation and delight of letter-writing — reimagined for the digital age.

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🌍 150+ countries
INBOX · 3 NEW
📬 From Japan
"Sakura season is here! Sending you a little piece of spring…"
🇯🇵
📬 From Brazil
"Olá! The carnival was incredible this year. Wish you were here!"
🇧🇷
1 letter arriving in 2 days
🏆 Earn stamps & rewards
150+
Countries connected
∞
Letters waiting to be written
Free
To download & get started
Why PostBox
Everything a pen-pal app should be
Thoughtfully crafted features that make every letter feel special.
✉️
Random Pen-Pals
Every letter is matched to a real person in another country — no followers, just strangers becoming friends.
🗺️
Distance-Based Delivery
Letters travel virtually across the globe. The further the destination, the longer (and more exciting) the wait.
🎨
Stamps & Postcards
Collect unique stamp and postcard designs from the in-app store. Make each letter unmistakably yours.
🏆
Rewards & Daily Tasks
Earn coins through daily check-ins, writing tasks, and inviting friends. Spend them in the store.
🔒
Privacy First
Your real identity is never exposed. You choose your display name, city, and what to share.
🌍
Global Community
Connect with people from over 150 countries. Every letter is a window into a different culture.
How it works
Four simple steps
From download to first reply — you'll be exchanging letters with the world in minutes.
1
Create your account
Sign up with your email, choose a display name, and set your city. No real name required.
2
Write a letter
Compose your message, pick a stamp and postcard design, then seal the envelope.
3
It travels the world
PostBox matches your letter to a real user and delivers it based on the real-world distance between you.
4
Start a thread
When they reply, a conversation begins. Keep writing, keep collecting, keep connecting.

Ready to write your first letter?

Download PostBox for free and join a community of pen-pals from around the world.

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Get it on Google Play