Rattlegram

SMS via audio!

5 reviews

Social Networking

Free

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About Rattlegram

Released
Updated
iOS Version
Age Rating
Size
Devices
Languages

November 20, 2023
December 12, 2024
15.6+
4+
683KB
iPhone, iPad, iPod
English

Developer of Rattlegram

aicodix GmbH

📦w/o updates

Updates frequency↘︎

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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.

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What's New in Rattlegram

1.8

April 5, 2024

* Improved robustness * Improved signal encoding * Prevent sleep while app is running * Added delay for Parrot Mode * Added debouncing for Parrot Mode * Added new options to the Danger Zone: - Toggle to favor Bluetooth audio if available - Toggle to output audio to default speaker - Print audio sample rates - Button to restart audio engine if stuck

Reviews of Rattlegram

Most Recent Highest Rated Lowest Rated

Great program

This work great. I am a HAM operator and can it also talk to FLDIGI or FLMSG? It is in PSK which is a great mode. Can’t wait to what else it can do. Thanks

Analog MJ

8 months ago

Response from developer

Thanks so much for the great review! We're glad you're finding Rattlegram useful. While Rattlegram utilizes PSK modulation within its OFDM-based system, it's currently designed specifically for audio coupling and text-over-audio functionality. We made a conscious decision to keep the app streamlined and efficient, so for now, it won't directly interface with modes like FLDIGI or FLMSG. However, we appreciate your interest in expanding Rattlegram's capabilities. We're always looking for ways to improve the app, so your feedback is valuable. If there's a way to integrate functionalities that align with our core audio-based messaging, we'll definitely consider it for future development. In the meantime, we hope you continue to enjoy using Rattlegram for clear and reliable text communication!

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