Taftan

Taftan moves a message or a small file from one phone to another without the internet. No SIM, no Wi-Fi, no account, no server. The two phones never touch a network, so there is no carrier or platform in the middle to log, slow, or block the exchange. Three offline channels Sound (acoustic tones) - Basic tones (700 to 1700 Hz) survive a phone call, a voice note, an old landline, or a noisy room. A short message takes about 10 to 17 seconds. - Ultrasonic tones (17 to 19 kHz) are inaudible and made for same-room transfer at roughly 30 cm to 1 m. QR codes - Show a code on one screen and point the other phone's camera at it. Best for files in the same room, at about one megabyte per minute at room distance. Hidden in a photo (Stego) - Tuck a short message inside an ordinary-looking photo, then share that photo any way you like. Only someone with the password can read it. - Normal mode does not change a single pixel, so the photo is identical to the original. - Robust mode survives re-encoding by chat and social apps. PNG and JPEG covers are both supported. Optional encryption - Turn encryption on when sending and the contents are scrambled with AES-256-GCM from a password you choose. The password never leaves your phone and is never sent anywhere. Agree it with the other person through a separate channel. Private by design - No sign-in, no phone number, no profile. - No analytics, no crash reporting, no telemetry. - Nothing is tied to you on any server, because there is no server. When it helps - A deliberate internet shutdown or an outage. - Meeting a source, client, or colleague in person. - Sharing a number, a short briefing, or a small file that should not be retained by a third party. - Anywhere the network itself is the thing you do not trust. Taftan is a low-throughput tool for short messages and small files, not a replacement for everyday chat. It does one thing: get a little data from one phone to another with nothing in between.