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Rattlegram

Name: Rattlegram
Availability: InStock
Rating: 4.52 (1 reviews)

Transform any audio channel into a high-efficiency data link. Use state-of-the-art signal processing for reliable, infrastructure-free communication over amateur radio or off-grid setups.

Communication & Messaging ›

Key Figures

Downloads

5K+

User Rating

4.5/5

Total Ratings

Publisher

aicodix GmbH

Engineered for Resilient Communication

Rattlegram bridges the gap between analog radio and modern digital precision, providing robust data transmission through advanced signal processing designed for the off-grid community.

Zero Infrastructure Dependency

Communicate person-to-person without cell towers, satellites, or internet. Ideal for emergency prep, SOTA/POTA hobbyists, and remote outdoor missions.

5G-Grade Signal Resilience

Utilizing COFDM technology and Polar codes, Rattlegram ensures your data survives heavy interference and low signal-to-noise ratios where other modes fail.

The following screenshots and description are sourced directly from the app's official store listing and are the property of the app developer.

App Store

Screenshots

Rattlegram - Interface of Rattlegram app displaying a log of transmitted and received text messages via audio data frequencies — Interface of Rattlegram app displaying a log of transmitted and received text messages via audio data frequencies

Rattlegram - User interface of the Rattlegram app displaying a history of sent and received text messages over audio. — User interface of the Rattlegram app displaying a history of sent and received text messages over audio.

Rattlegram - Compose message interface in the Rattlegram app — Compose message interface in the Rattlegram app

Rattlegram - Rattlegram app interface showing a log of received and transmitted text messages including a Rickroll snippet and the word Listening at the bottom — Rattlegram app interface showing a log of received and transmitted text messages including a Rickroll snippet and the word Listening at the bottom

Rattlegram - Interface for composing a digital message in Rattlegram showing the text Hello World and a transmit button — Interface for composing a digital message in Rattlegram showing the text Hello World and a transmit button

Description

COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology: - 160 ms long OFDM symbols - 6.25 Hz per sub-carrier - 1/8 guard interval - differentially encoded PSK (phase-shift keying) modulation - systematic polar codes for forward error correction Currently Modes 14, 15 and 16 are supported: Using either SPC(2048, 1392), SPC(2048, 1056) or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. Only a bandwidth of 1600 Hz is needed and the transmission of either 85, 128 or 170 bytes take about one second with the leading noise and fancy header disabled.