# Rattlegram vs GRG

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.

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.

## The numbers

| Metric | Rattlegram | GRG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (29 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 9 months** | Every 14 months |
| Monetization | Free | — |
| Size | 1 MB | 3 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [aicodix GmbH](https://appshunter.io/developer/1664526098) | [Create Community](https://appshunter.io/developer/1763885668) |

## 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


### GRG

[App page](https://appshunter.io/ios/app/grg/id6720709998)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rattlegram free?

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

### Is GRG free?

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

### Do Rattlegram or GRG have ads?

GRG shows ads; Rattlegram does not.

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

Rattlegram ships an update every 9 months, and GRG every 14 months. Most recently, Rattlegram was updated on October 25, 2026 and GRG on October 25, 2026.

---

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