---
title: "Rattlegram - Reviews, Revenue and Downloads in United States | Apple App Store"
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-s"
---

# Rattlegram — United States
> SMS via audio!

![Rattlegram App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/5c/b2/83/5cb28307-b3b8-365b-c7ce-e61b5c38321d/AppIcon-0-0-1x_U007epad-0-1-85-220.png/400x400bb.png)

**Developer:** [aicodix](https://apptail.io/developer/aicodix-QzXe) (Germany)
**Category:** Social Networking
**Rating:** 4.6/5 (28 ratings)
**Price:** Free
**Bundle ID:** com.aicodix.Rattlegram
**Store:** Apple App Store
**Country:** United States
**Version:** 1.10 (released 2026-01-04)
**Original Release:** 2023-11-20

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1664526096)
**AppTail Page:** [https://apptail.io/app/rattlegram-zwto/united-states](https://apptail.io/app/rattlegram-zwto/united-states)

## Rattlegram 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.

## Rattlegram Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource123/v4/27/80/fe/2780fe7a-3329-6a47-5ef3-dc8407a34347/55aacfb3-17ea-4a01-a22a-cd4e1455e2dc_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2023-01-16_at_11.27.19.png/2778x1284.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource123/v4/f3/28/56/f3285641-bdb3-8e07-af09-4e93b1529d3e/99b2ed40-f371-4d5d-b9af-fdc913518d4a_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2023-01-16_at_11.25.52.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource123/v4/29/96/67/299667c5-4362-963b-6254-6e1955c2c847/624e627d-5b94-434a-becd-361c915b5199_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2023-01-16_at_11.25.12.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource123/v4/f8/10/62/f810625c-dcf0-c5ad-01b9-129c6e919003/b44c738a-2872-49ae-b06c-8f894eb5e106_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2023-01-16_at_11.21.56.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource113/v4/00/50/f9/0050f99d-04df-76a8-e2b7-78d117058f81/4420d919-4e60-4f87-8aa4-6b62013ce9c3_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2023-01-16_at_11.20.10.png/1284x2778.png)

## Rattlegram Rating Breakdown in United States
- 5 stars: 22 (79%)
- 4 stars: 3 (11%)
- 3 stars: 2 (7%)
- 2 stars: 0 (0%)
- 1 stars: 1 (4%)

## Rattlegram Reviews in United States

### ***** "Great SMS App"
Excellent App. Was able to obtain App for iPad, iPhone, and Android Tablet. All communicated to each other perfectly and easily thru air as well as thru Baofeng UV-5R on VHF/UHF and G-90 on several SW bands. USB is touchy and tuning must be careful, but impossible.

I notice Android version slightly different than iOS version. Found no version for Mac. PC version somewhat difficult to install and requires Android to Windows plugin.

Perhaps greatest App I’ve ran across recently. Thanks!

73s, Tom, ex-WA0DJP
-- BeardedWizard47, 2025-01-27

### ***** "Favorite radio messaging app"
Love this app, I use it with a digirig lite and it works perfect like that. I would also like to see KISS TNC support if possible!
-- GlassOfNut, 2024-12-31

### ***** "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, 2024-04-05

### ***** "Great idea"
I downloaded for my iPhone.  At the bottom it says unable to create decoder.  How can I fix?
-- Agg20000000000, 2024-04-05

### *---- "Downloaded app, functions missing."
Please advise. It appears as the IOS version has text creation and call sign disabled, however mike is still enabled on install. Please advise and I will test again and re-rate. Thanks
-- 123djm123, 2024-03-10

### ***** "Amazing"
Very cool app not too sure how too delete messages but amazing
-- ytcandobetter, 2024-03-08

### ****- "I would give it 5 stars but…"
Really nice application that allows the transmission of text via two way radio.  Only reason I don’t give it 5 stars is that you don’t or I haven’t figured out yet, how to delete previous messages.  I would like to start a new session without seeing the history of past transmissions.
-- St. George Paddler, 2024-01-26

[View all Rattlegram reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## Rattlegram Discovered Keywords
- up
- rattlegram

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## Rattlegram Available In
- [United States](https://apptail.io/app/rattlegram-zwto/united-states)
- [Germany](https://apptail.io/app/rattlegram-zwto/germany)
- [Canada](https://apptail.io/app/rattlegram-zwto/canada)
- [Finland](https://apptail.io/app/rattlegram-zwto/finland)
- [Australia](https://apptail.io/app/rattlegram-zwto/australia)
- [Netherlands](https://apptail.io/app/rattlegram-zwto/netherlands)
- [Malaysia](https://apptail.io/app/rattlegram-zwto/malaysia)
- [Thailand](https://apptail.io/app/rattlegram-zwto/thailand)
- [Vietnam](https://apptail.io/app/rattlegram-zwto/vietnam)
- [South Africa](https://apptail.io/app/rattlegram-zwto/south-africa)
- [Algeria](https://apptail.io/app/rattlegram-zwto/algeria)
- [Ecuador](https://apptail.io/app/rattlegram-zwto/ecuador)
- [France](https://apptail.io/app/rattlegram-zwto/france)
- [United Kingdom](https://apptail.io/app/rattlegram-zwto/united-kingdom)
- [India](https://apptail.io/app/rattlegram-zwto/india)

---

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