# Rattlegram vs HumHub

The clearest difference is review sentiment: Rattlegram at 90% against HumHub's 33%. Rattlegram also leads on rating (4.5 vs 4.0) and ratings volume (23 vs 2). HumHub's advantage is update cadence (every 3 weeks vs every 9 months). On price, ads, in-app purchases and monetization model 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 4.0. That said, the two scores are not equally well evidenced: Rattlegram has 23 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 90% of Rattlegram's written reviews are positive against 33% of HumHub's.

Rattlegram ships an update every 9 months, HumHub every 3 weeks. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Rattlegram | HumHub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (23 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/humhub/id6446092274/reviews) |
| Number of ratings | **23** | 2 |
| Positive reviews | **90.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 34 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [aicodix GmbH](https://appshunter.io/developer/1664526098) | [HumHub GmbH & Co. KG](https://appshunter.io/developer/1675880932) |

## What reviewers say

### 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


### HumHub

[App page](https://appshunter.io/ios/app/humhub/id6446092274)

This open-source platform facilitates communication and collaboration within organizations. It allows users to create dedicated spaces, share content, manage projects, and interact with colleagues through features like direct messaging and group chats.

**Highlights:** Create and manage organizational spaces, User profiles with customizable fields, Direct messaging and group chats, Content sharing and commenting, Project management and calendars, Wiki pages and file storage, Extensible with over 70 modules

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rattlegram free?

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

### Is HumHub free?

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

### Which has better reviews, Rattlegram or HumHub?

Rattlegram is rated higher. Rattlegram averages 4.5 out of 5 from 23 ratings, while HumHub averages 4.0 from 2 ratings.

### Do Rattlegram or HumHub have ads?

Neither Rattlegram nor HumHub shows ads.

### Which is updated more often, Rattlegram or HumHub?

Rattlegram ships an update every 9 months, and HumHub every 3 weeks. Most recently, Rattlegram was updated on October 11, 2026 and HumHub on October 5, 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.*