Groups.io App vs Rattlegram
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Groups.io App
This app provides a modern platform for online communities with powerful management tools. It offers advanced features like hashtag organization, topic muting, and integrations with other services. Users can find, join, and manage groups, receiving real-time notifications.
- Advanced group management
- Hashtag archive organization
- Mute individual topics
- Real-time push notifications
- Integrated Chat, Calendar, Polls
- Integrations with RSS, Trello, Github
- Member synchronization with Slack
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Groups.io is the next generation platform for online communities. We are a modern platform for serious communities. Powerful management tools. Mobile ready. No ads, no tracking. We have the most advanced features of any group system, including: - Better archive organization with hashtags - Mute individual topics and hashtags - Advanced group management - Powerful additional features, including Chat, Calendar, Polls, Databases, Wiki, Files and Photos - Additional integrations with RSS, Trello, and Github - Member synchronization with Slack This app lets you: - Find and subscribe to existing groups - Receive real time push notifications about activity in your groups - Create and manage your groups
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.
Screenshots
Verdict
The clearest difference is review sentiment: Rattlegram at 90% against Groups.io App's 36%. Rattlegram also leads on rating (4.5 vs 3.0). Groups.io App's advantage is iOS requirement (13.0 vs 17.6). On price, ratings volume, update cadence and ads 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 holds the better App Store score, 4.5 against 3.0. Both are backed by a comparable volume of ratings — 24 and 23 respectively. Written reviews point the same way: 36% of Groups.io App's written reviews are positive against 90% of Rattlegram's.
Both ship on a similar rhythm, roughly every 9 months. The most recent releases landed on September 4, 2026 and September 8, 2026 respectively.
| Parameter | Groups.io App | Rattlegram |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (24 ratings) | 4.5 (23 ratings) — better |
| Positive reviews | 36.0% of reviews | 90.0% of reviews — better |
| Number of ratings | 24 — better | 23 |
| Update frequency | Every 9 months | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 32 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Groups.io, Inc | aicodix GmbH |
Customer experience
Groups.io App
Rattlegram
In-app purchases
Groups.io App
No in-app purchases
Rattlegram
No in-app purchases
