# Rattlegram vs Wave73

Rattlegram and Wave73 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Rattlegram | Wave73 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (23 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | — |
| Monetization | Free | — |
| Size | 1 MB | 4 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [aicodix GmbH](https://appshunter.io/developer/1664526098) | [Santiago Mejia](https://appshunter.io/developer/1893769946) |

## 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


### Wave73

[App page](https://appshunter.io/ios/app/wave73/id6762312141)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rattlegram free?

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

### Is Wave73 free?

Wave73 is free to download, with no in-app purchases.

### Do Rattlegram or Wave73 have ads?

Neither Rattlegram nor Wave73 shows ads.

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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.*