# Groups.io App vs Rattlegram

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.

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.

## The numbers

| Metric | Groups.io App | Rattlegram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (24 ratings)](https://appshunter.io/ios/app/groupsio-app/id1553820507/reviews) | **[4.5 (23 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews)** |
| Number of ratings | **24** | 23 |
| Positive reviews | 36.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | Every 9 months |
| Monetization | Free | Free |
| Size | 32 MB | 1 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Groups.io, Inc](https://appshunter.io/developer/1482415932) | [aicodix GmbH](https://appshunter.io/developer/1664526098) |

## What reviewers say

### Groups.io App

[App page](https://appshunter.io/ios/app/groupsio-app/id1553820507)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Rattlegram

[App page](https://appshunter.io/ios/app/rattlegram/id1664526096)

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.

**Highlights:** COFDM technology, Audio-based SMS, 160 ms OFDM symbols, Differential PSK modulation, Forward error correction, Low bandwidth requirement

**In-app purchases:** none


## Frequently asked questions

### Is Groups.io App free?

Groups.io App is free to download, with no in-app purchases.

### Is Rattlegram free?

Rattlegram is free to download, with no in-app purchases.

### Which has better reviews, Groups.io App or Rattlegram?

Rattlegram is rated higher. Groups.io App averages 3.0 out of 5 from 24 ratings, while Rattlegram averages 4.5 from 23 ratings.

### Do Groups.io App or Rattlegram have ads?

Neither Groups.io App nor Rattlegram shows ads.

### Which is updated more often, Groups.io App or Rattlegram?

Groups.io App ships an update every 9 months, and Rattlegram every 9 months. Most recently, Groups.io App was updated on September 4, 2026 and Rattlegram on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*