Blubing is a messenger that works without the internet. It finds the people within about 50 metres, and lets you chat, plan and play with them over Bluetooth. Private chats are end-to-end encrypted.
Blubing doesn't use a server or a mobile signal. Phones running Blubing find each other over Bluetooth Low Energy and pass messages directly. When a friend is out of reach, the messages travel through other Blubing phones nearby.
Pick a name, an emoji and a colour. There's no sign-up, email or phone number.
Everyone nearby with Blubing open shows up on your radar, from right next to you to across the room.
Wave, chat, start a group or a game. If someone walks out of range, your message waits and is delivered when you meet again.
Festivals, flights, campuses, hikes, crowded stadiums: Blubing works where the mobile network doesn't.
Make a group, run a poll, pin the plan and share a checklist. Answer with a Blu sticker for every mood.
Pin an invite, a vote or a lost-and-found note for everyone in range. Posts are signed and fade after a few hours.
Lost each other at the concert? Once your friend says yes, Blubing shows how close they are. Bluetooth signal only, no GPS, and it stops after 10 minutes.
Play Crazy Eights with 2–5 nearby players, or get the group together for Imposter or Bluff Dice. Challenge a friend to Chess, Four in a Row, Reversi, Dots and Boxes or Gomoku. Those last four board games also have solo play against Blu.
Blubing has no messaging server. Your chat history stays on the participating devices, and Blubing exchanges messages over Bluetooth.
Each message is sealed for the person it's meant for, so anyone listening to the radio, or a phone passing it along, sees only scrambled bytes.
X25519 · AES-GCMBlubing uses Bluetooth for nearby messaging. The Android app has no internet permission.
0 network callsThere's no sign-up, email, phone number or contact upload. Your identity is a key made on your phone.
No sign-upBlubing stores your contacts and encounter history on your device. Chat participants keep their own copies of messages.
On-device onlyCompare six Blus with your friend, side by side. If they match, nobody is listening in between.
6-Blu safety codeGhost mode, app lock, and a panic wipe that erases every chat and your identity at once.
Usually 10 to 50 metres between two phones, depending on walls and crowds. Messages can also hop through other Blubing phones, so a busy place reaches further.
No. Blubing uses only Bluetooth. It works on a plane, underground, at a festival with no signal, or with your data switched off.
Your message waits on your phone and is delivered automatically when you're back in range. Two Blubing phones near you can also carry it, sealed so they can't read it.
Only people near you who have Blubing open. They see your name, emoji, colour, status and interests, and nothing else. Turn on ghost mode to see others without appearing on their radar.
Direct and group chats are end-to-end encrypted for the intended recipients. Here and Board posts are visible to nearby participants.
Yes. Visit Downloads for the signed Android APK, installation steps and the version history. Android 14 or newer is required.
Yes. Get Blubing 0.6.0 on the App Store for iPhone and iPad running iOS or iPadOS 17 or newer. It can chat and play over Bluetooth with nearby Android devices running a compatible version.
Blubing 0.6.0 is available on Google Play and the App Store.
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