Rattlegram - SMS via audio! has 45 thousand installs. Users rate it well: 4.4 stars from 220 ratings. Show more ›
Rattlegram - SMS via audio! is made and published by
aicodix GmbH.
AppBrain is an independent app data site and isn't affiliated with aicodix GmbH.
The app name, icon, screenshots and description belong to aicodix GmbH and are shown as
published on Google Play.
Pros & Cons
Niche, audio-based messaging differentiates it from traditional texting apps
Efficient low-bandwidth design with compact payloads
Robust error correction via polar codes and differential PSK
Active development with 16 KB page size support and libs/tools updates
Not listed in any top app lists, which may affect visibility
Niche encoding focus may limit appeal to mainstream users
Lacks conventional text/radio-style features emphasized by some competitors (based on available keywords)
About Rattlegram - SMS via audio!
Rattlegram - SMS via audio! is a communication app developed by aicodix GmbH.
Install Statistics
Rattlegram - SMS via audio! has been installed 45 thousand times. In the last 30 days, the app was installed 920 times.
User Ratings
Rattlegram - SMS via audio! is rated 4.38 out of 5 stars. The rating is based on 220 ratings.
App Information
Rattlegram - SMS via audio! is freely available from Google Play. The app size is 5.31 MB. The latest version available is 1.18. The last update was on November 11, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play since January 2023.
Description by aicodix GmbH(from Google Play)
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.
Recent changes: - added support for 16 KB page size - updated libs and tools
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Comments on Rattlegram - SMS via audio! for Android
★★★★☆Doug Offord· Feb 2, 2025
Works well. Would like to have ability to send longer text messages and images.
★★★★★TacticalBacon· Apr 23, 2023
Can we get the ping feature to trigger a notification on phone and a toggle option for it to listen in background or messages triggering a notification, so you can ping someone before sending a message, and they will be ready to receive and be alerted to it or a radio pass-through This will allow us to be able to receive messages while also using our phones for other task while using handle held Aux cable where you would no longer hear radio noise
★☆☆☆☆Knowledgeablelandon· May 27, 2024
Garbage! Every message fails to decode, therefore this app is useless. Should be deleted from the play store.
★★☆☆☆William Linton· Jan 22, 2024
Need better directions on how to use it. It took me forever to get it to work. Sometimes it doesn't work at all
★★☆☆☆Adrian Anderson· Jan 24, 2024
The app isn't translating the received messages. I uninstalled and reinstalled the app multiple times trying to fix it but no dice.
Google Play Rankings for Rattlegram - SMS via audio!
This app is not ranked
Technologies used by Rattlegram - SMS via audio!
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