Talk and transact when the network stops.
BitMadWall is a mobile application. Encrypted mesh messaging and an offline Bitcoin wallet run on the same device and share the same transport. Neither requires internet, a SIM, a subscriber record, or a central server.
Messaging with no carrier in the path.
One-to-one and group conversations carried by the devices around you. Your identity is a secure key, not a phone number, and every message is sealed end to end and signed by its sender.
No phone number. No account.
Identity is a key pair generated on the device. No registration, no directory, no subscriber record for anyone to request.
Sealed and signed
Built on the same published standards Signal uses: keys agreed directly between the two devices, content sealed before it moves, and a signature any carrier can check without reading a word. The named standards are listed on the Security page.
Ephemeral by default
Messages live on the handset, not in a cloud. Disappearing timers and secure erase are per conversation; panic wipe is immediate.
- Not a data-collecting messenger
- No phone number, no email, no contact upload, no central store of conversations. There is no dataset to disclose because none is created.
What the conversation actually looks like.
The messaging surface, on the desk and in the hand.
Sign now. Broadcast when a route exists.
Sign with no connectivity at all; the transaction rides the mesh until any device with a route out hands it to the chain.
- +0.021 000Received · confirmed
- −0.004 500Sent · waiting for a route
Completes when any phone in the mesh reaches the internet. Until then the app counts it as not yet paid.
- +0.067 713Received · long settled
Signed on the device
Keys are created and kept in the phone's built-in secure hardware where the platform provides it. The payment is complete and signed before it ever enters the mesh.
The mesh carries it
Carried like any message, held through the gaps, until a device with internet hands it to the Bitcoin network. If two devices both hand it over, no harm is done: the network accepts it once.
Bitcoin first, built for more
The transport treats transaction data as an opaque payload. Further chains are a wallet-side addition, not a protocol change.
- Not a bank
- We hold no funds and operate no accounts. Keys exist on the handset and nowhere else.
- Not custodial
- There is no recovery service. If the seed is lost, we cannot restore it. That is a property of the design, not a gap in it.
A balance, a pending send, and no bank behind it.
The wallet, holding a balance and an unconfirmed send.
Built for the days the map goes dark.
The scenarios below are the design brief, not marketing. In each, coverage is the people present, and every additional handset is an alternate path.
Grid blackout
BLE meshA city loses power and towers with it; neighbourhoods keep coordinating handset to handset.
Disaster zone
Mesh + gatewayInfrastructure is down for weeks; response teams message and settle payments locally.
Contested city
Dense meshThe network is shut off on purpose; crowds stay reachable without a carrier to lean on.
Off-grid range
+ LoRaValleys and coastlines the towers never reached; one paired LoRa radio joins whole settlements.
Between villages
Data muleA traveller carries the mesh on foot. Messages are delivered hours later, by a person.
Shipping plainly, aiming far.
The MVP launches labelled Early Access, and the label is honest: range is limited and delays are expected. What follows it is already designed for.
Request a technical briefing.
We will walk through the architecture, the threat model, and the limits.
Or write directly to info@tashitech.ai.