# SWLtools vs PhosphorRTTY

The clearest difference is price: PhosphorRTTY at $0.99 against SWLtools's $3.99. SWLtools's advantage is iOS requirement (17.0 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

SWLtools costs $3.99 and PhosphorRTTY $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | SWLtools | PhosphorRTTY |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | — | Paid |
| Size | 5 MB | 3 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stefano Rampazzo](https://appshunter.io/developer/396660919) | [Stuart Woolley](https://appshunter.io/developer/315697638) |

## What reviewers say

### SWLtools

[App page](https://appshunter.io/ios/app/swltools/id6618146941)

**In-app purchases:** none


### PhosphorRTTY

[App page](https://appshunter.io/ios/app/phosphorrtty/id6760180586)

Decode Radio Teletype (RTTY) signals in real time using your iPhone's microphone. Listen to shortwave radio transmissions and see the text appear on an authentic phosphor CRT display. No internet or external hardware needed.

**Highlights:** Real-time RTTY signal decoding, Authentic phosphor CRT display, Automatic signal detection (AFC, baud, shift), Manual tuning options, Live signal analysis (FFT, waterfall), Session logging and sharing, Customizable display themes

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

**In-app purchases:** none


## Frequently asked questions

### Is SWLtools free?

SWLtools costs $3.99, with no in-app purchases.

### Is PhosphorRTTY free?

PhosphorRTTY costs $0.99, with no in-app purchases.

### Do SWLtools or PhosphorRTTY have ads?

Neither SWLtools nor PhosphorRTTY 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.*