# Rattlegram vs OpLine

The clearest difference is price: Rattlegram at Free against OpLine's $9.99. Rattlegram also leads on ratings volume (23 vs 3). OpLine's advantage is rating (5.0 vs 4.5) and update cadence (weekly vs every 9 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Rattlegram is free to download; OpLine costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OpLine holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Rattlegram has 23 ratings behind it against 3, 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 100% of OpLine's.

Rattlegram ships an update every 9 months, OpLine weekly. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Rattlegram | OpLine |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.5 (23 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/opline/id6763101817/reviews)** |
| Number of ratings | **23** | 3 |
| Positive reviews | 90.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#35** |
| Size | 1 MB | 6 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [aicodix GmbH](https://appshunter.io/developer/1664526098) | [Justin Calvert](https://appshunter.io/developer/764916557) |

## 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


### OpLine

[App page](https://appshunter.io/ios/app/opline/id6763101817)

**Currently charting:** #35 Top Paid · Social Networking (US App Store)

This app provides licensed amateur radio operators with a fast, native iOS client for the AllStarLink network. It offers push-to-talk functionality, live net schedules, smart favorites, and real-time telemetry for a reliable mobile experience.

**Highlights:** Push to Talk (hold or toggle), Live Net Schedule with alerts, Smart Favorites for nodes and nets, Real-Time Telemetry (RX/TX meters), Worldwide AllStarLink node coverage, Native iOS design with dark mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rattlegram free?

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

### Is OpLine free?

OpLine costs $9.99, with no in-app purchases.

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

OpLine is rated higher. Rattlegram averages 4.5 out of 5 from 23 ratings, while OpLine averages 5.0 from 3 ratings.

### Do Rattlegram or OpLine have ads?

Neither Rattlegram nor OpLine shows ads.

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

Rattlegram ships an update every 9 months, and OpLine weekly. Most recently, Rattlegram was updated on October 11, 2026 and OpLine on October 10, 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.*