Rattlegram - SMS via audio!

Developer: aicodix GmbH

Category: Communication

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40.6K installs

220 ratings

2.2K monthly active users

Revenue not available

Install Trends

Weekly +209

Steady

Monthly +575

Steady

Rattlegram - SMS via audio! Summary

Rattlegram - SMS via audio! is a mobile Android app in Communication by aicodix GmbH. Released in Jan 2023 (3 years ago). It has about 40.6K+ installs and 220 ratings with a 4.72★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 2.2K monthly active users . Store metadata: updated Dec 17, 2025.

Recent activity: 209 installs this week (575 over 4 weeks) showing below average growth , and 1.00 new ratings this week View trends →

Store info: Last updated on Google Play on Dec 17, 2025 .

SDKs, Trackers & Permissions

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App Details

Store ID: com.aicodix.rattlegram

First Released: 2023-01-12

Store Last Updated: 2025-12-17

In-App Purchases: No

Ads: No

Website: aicodix.de

App Store

Crawl Status: Success

AppGoblin First Crawled: 2024-01-13

AppGoblin Last Crawled: 2026-05-19

Ads & App-Ads.txt

App does not have ads.

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4.72★

Ratings: 220

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Screenshots

App Description

Transmit short text messages over COFDMTV encoded audio signals

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.