App Screenshots
WhisprChat is a secure peer-to-peer messenger that works completely offline. Built with end-to-end encryption and a mesh relay network, it keeps you connected without servers, SIM cards, or internet access.
Private messages use P256 key agreement and AES-GCM encryption, ensuring only you and your contacts can read them.
Messages automatically hop across nearby devices using Bluetooth (10–100m) and WiFi Direct (50–200m) for extended range.
Send public messages to everyone nearby — perfect for group discovery, events, or local announcements.
Exchange contacts securely by scanning QR codes that include public key verification, no phone numbers required.
Operate entirely without internet or central servers. All data remains local on your device.
Devices automatically find and connect to nearby peers in the background with no setup required.
WhisprChat selects the best protocol (BLE or WiFi Direct) based on range and signal quality for reliable delivery.
Messages and contacts are never uploaded — everything stays on your device, under your control.
WhisprChat is designed for everyday offline communication in safe, legal contexts. Common use cases include: staying connected at festivals, conferences, and travel; private messaging where connectivity is unreliable; and emergency preparedness during outages or natural disasters.
The app does not provide VPN, proxy, or tunneling services. It uses Apple’s
CoreBluetooth and Network.framework APIs for peer-to-peer
device communication. No servers are used, and no personal data is collected.
Encryption is handled using Apple’s CryptoKit (P256 + AES-GCM). This is standard, Apple-approved encryption. No custom or export-restricted cryptography is used.