# RST 599TK Pro vs LemurKey

The clearest difference is price: LemurKey at Free against RST 599TK Pro's $2.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

LemurKey is free to download; RST 599TK Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RST 599TK Pro | LemurKey |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/lemurkey/id6798342620/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | — | Free |
| Size | 32 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Steve Metcalf](https://appshunter.io/developer/6798342622) |

## What reviewers say

### RST 599TK Pro

[App page](https://appshunter.io/ios/app/rst-599tk-pro/id1511628467)

**In-app purchases:** none


### LemurKey

[App page](https://appshunter.io/ios/app/lemurkey/id6798342620)

This app provides Morse code receiving practice for callsigns, sentences, and two-way contacts. It features adjustable settings, a Koch-style learning mode, and simulated interference for realistic training. Compete with friends on leaderboards and track your progress.

**Highlights:** Morse receiving practice, Adjustable WPM and spacing, Scripted two-way QSO mode, Live DX band conditions, Koch-style learning mode, Simulated interference options

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RST 599TK Pro free?

RST 599TK Pro costs $2.99, with no in-app purchases.

### Is LemurKey free?

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

### Do RST 599TK Pro or LemurKey have ads?

Neither RST 599TK Pro nor LemurKey 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.*