Rattlegram is a free iPhone application developed by aicodix GmbH in the Social & Communication category, specifically focusing on social networking. The program utilizes COFDMTV technology, employing 160 ms long OFDM symbols, 6.25 Hz per sub-carrier, and 1/8 guard interval. It incorporates differentially encoded PSK modulation and systematic polar codes for forward error correction.

Rattlegram currently supports Modes 14, 15, and 16, utilizing SPC(2048, 1392), SPC(2048, 1056), or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. The application operates efficiently, requiring only a bandwidth of 1600 Hz and enabling the transmission of 85, 128, or 170 bytes in approximately one second, with noise and fancy header disabled.