# Rattlegram vs Stellarect

The clearest difference is in-app purchases: Rattlegram at none against Stellarect's 4. Stellarect's advantage is update cadence (weekly vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stellarect sells 4 in-app purchases, starting at $0.99 per month. Rattlegram asks for nothing beyond the download.

Rattlegram ships an update every 9 months, Stellarect weekly. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Rattlegram | Stellarect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (28 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | Free | — |
| Size | 1 MB | 43 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [aicodix GmbH](https://appshunter.io/developer/1664526098) | [Rohan Gupta](https://appshunter.io/developer/1535022012) |

## 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


### Stellarect

[App page](https://appshunter.io/ios/app/stellarect/id6484311224)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Stellarect Pro Monthly | $1.99 | per month |
| Yearly | $4.99 | per year |
| Stellarect Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Rattlegram free?

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

### Is Stellarect free?

Stellarect is free to download, with in-app purchases available.

### Do Rattlegram or Stellarect have ads?

Neither Rattlegram nor Stellarect shows ads.

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

Rattlegram ships an update every 9 months, and Stellarect weekly. Most recently, Rattlegram was updated on October 24, 2026 and Stellarect on October 16, 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.*