NOLOSS - Offline Mesh Chat

Offline Bluetooth mesh chat that works with no internet and no signal. NOLOSS lets nearby phones connect over Bluetooth and pass messages along like a bucket brigade, so you can talk where there is no cell service and no Wi-Fi. No sign-up, free. Works with bitchat users, too.

WHAT YOU CAN DO
• Chat with no signal (Bluetooth)
• Every phone relays for the others
• Talk to bitchat users
• Pay It Forward: share one phone's internet connection
• Invite a far-away friend
• No account, no servers, open source


■ Offline Bluetooth chat, no signal needed

Your phone connects directly to phones near you over Bluetooth. Even if someone is far away, the phones of people in between carry your message along, so the more people use it, the farther it reaches.
No phone number or email address needed. Just open the app and you're in.


■ Works with bitchat

When you're nearby, NOLOSS and bitchat users share the same chat area and can talk to each other.
bitchat is an open-source Bluetooth chat app that works with no signal or internet. NOLOSS is built on it and adds features.


■ Pay It Forward: share your internet connection

Think of tethering, carried across many phones.
If one person nearby has mobile data, everyone can share that connection. Just like chat, the phones in between relay it, so it reaches you even when you're far from the person sharing.

• The person sharing needs Android 10 or later and a mobile data connection (you can't share while connected to Wi-Fi, such as at home).
• Receiving needs a one-time setup. The app guides you through it on screen, step by step.
• Everyday use such as web browsing works (some types of connections are not supported).


■ Invite someone far away

When the internet is available, you can invite one person who is far away into your "chat area" by link or QR code.
When both sides agree, two chat areas become one, so groups in different places can talk to each other too.

You choose how to connect each time you invite. "Maverick (direct)" connects straight to the other person with nothing in between. "Maat (distributed)" takes a detour, so it rarely drops, and the connection stays up even after the person who invited leaves.


■ When it helps

• Mountains, campsites, festivals, fireworks shows: places where the network gets overloaded
• Underground, on boats, deep in the countryside: places with no coverage at all
• Days when an outage takes the internet down
• As part of your disaster preparedness, in case of an emergency

NOLOSS doesn't need the internet, so it works as long as people around you are using it.
Install it now, before you need it. On that day, your phone might be the one that carries someone's message.


■ For your safety

• You can block unwanted people from the list of people in your chat area or by long-pressing their message.
• A filter that automatically hides offensive words is on from the start (you can change this in Settings).
• One-on-one messages are encrypted between devices, so even we can't read them. We don't run any servers.
• Available in 15 languages, including English and Japanese.


■ Notice

• This app is not a substitute for emergency calls (such as 911, 112 or 119). It does not guarantee rescue or communication during a disaster. If no one nearby is using this app, your messages will not be delivered.
• Bluetooth and location permissions are needed to find people nearby. We never record the location obtained through this permission, and we never receive it. For how data is handled for ad delivery, see the privacy policy.
• This app is developed based on the open-source software bitchat-android (GPL-3.0). It is not the official bitchat app.