Rattlegram vs GRG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rattlegram
This app utilizes advanced COFDM technology for audio-based SMS transmission. It supports various modes with specific encoding and modulation techniques, requiring minimal bandwidth for efficient data transfer.
- COFDM technology
- Audio-based SMS
- 160 ms OFDM symbols
- Differential PSK modulation
- Forward error correction
- Low bandwidth requirement
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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.
GRG
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GRG is an app for music artists, producers, DJs, and promoters. Connect with a vibrant community, share your music, and stay informed with our event calendar featuring the hottest concerts and shows. Stay updated with announcements about new releases, upcoming shows, and more! With our app you can: - Post your music in our community feed - Join chat rooms - View events happening in the local scene - Manage your profile and posts - Receive notifications on posts, comments, chats, events and more
Screenshots
Verdict
The clearest difference is ads: Rattlegram at none against GRG's shown. GRG's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Rattlegram ships an update every 9 months, GRG every 14 months. Both last shipped on October 25, 2026.
| Parameter | Rattlegram | GRG |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (29 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 29 — better | — |
| Update frequency | Every 9 months — better | Every 14 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 12+ |
| Developer | aicodix GmbH | Create Community |
In-app purchases
Rattlegram
No in-app purchases
GRG
No in-app purchases
