Stay connected when the network can't keep up
CrowdHop is a free Android messenger that relays end-to-end encrypted messages through nearby phones over a Bluetooth mesh — no signal, no SIM, no account.
How It Works
Pair
Hold phones close to swap contact info over Bluetooth securely.
Message
Send texts that hop through nearby phones to reach your contact.
No signal needed
Works at packed festivals, concerts, stadiums, or in emergencies.
Use Cases
Sporting events
Emergency backup
Off-grid trips
Key Features
- Works without internet or cell signal
- End-to-end encrypted messages (AES-256-GCM)
- No account, no sign-up, no servers
- Battery-friendly background service
- Quick-phrase templates for loud environments
Frequently Asked Questions
Does CrowdHop need an internet connection?
No. CrowdHop has no internet permission and never contacts a server. All messaging happens locally over Bluetooth Low Energy.
Does CrowdHop need a SIM card or phone number?
No. There is no sign-up. An anonymous ID is generated on your device the first time you launch the app.
Are my messages encrypted?
Yes. Messages between paired contacts are end-to-end encrypted with AES-256-GCM. Relay devices forward packets without being able to read their contents.
How far can a message travel?
Each Bluetooth hop reaches tens of meters. In a crowd, messages extend much further by being relayed through other phones running CrowdHop.
Does CrowdHop work on iPhone?
Not yet. CrowdHop is currently Android-only and available on Google Play.
Is CrowdHop free?
Yes. CrowdHop is free, has no paid tier, and contains no advertising or third-party SDKs.