# SWLtools vs PhosphorHertz

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

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

SWLtools ships an update every 2 months, PhosphorHertz every 4 months. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SWLtools | PhosphorHertz |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Paid | — |
| Size | 5 MB | 5 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| 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)

Enhance your shortwave listening with this app that decodes on-air text modes like Morse, RTTY, and WEFAX. It also features spectrum analysis, audio recording, and is optimized for portable use with specific receivers.

**Highlights:** Decode Morse, RTTY, WEFAX, and ACARS, Real-time spectrum and spectrogram display, Audio recording and storage, Save and share decoded text, Optimized for Belka receiver, ACARS position mapping

**In-app purchases:** none


### PhosphorHertz

[App page](https://appshunter.io/ios/app/phosphorhertz/id6759729656)

**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 PhosphorHertz free?

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

### Do SWLtools or PhosphorHertz have ads?

Neither SWLtools nor PhosphorHertz shows ads.

### Which is updated more often, SWLtools or PhosphorHertz?

SWLtools ships an update every 2 months, and PhosphorHertz every 4 months. Most recently, SWLtools was updated on October 12, 2026 and PhosphorHertz on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*