# SWLtools vs SDRFE Spectrum Analyser

The clearest difference is price: SDRFE Spectrum Analyser at Free against SWLtools's $3.99. SDRFE Spectrum Analyser also leads on update cadence (every 9 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SDRFE Spectrum Analyser is free to download; SWLtools costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SWLtools ships an update every 2 months, SDRFE Spectrum Analyser every 9 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | SWLtools | SDRFE Spectrum Analyser |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 5 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefano Rampazzo](https://appshunter.io/developer/396660919) | [XionLogic Limited](https://appshunter.io/developer/1855294139) |

## 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


### SDRFE Spectrum Analyser

[App page](https://appshunter.io/ios/app/sdrfe-spectrum-analyser/id6758634671)

**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 SDRFE Spectrum Analyser free?

SDRFE Spectrum Analyser is free to download, with no in-app purchases.

### Do SWLtools or SDRFE Spectrum Analyser have ads?

Neither SWLtools nor SDRFE Spectrum Analyser shows ads.

### Which is updated more often, SWLtools or SDRFE Spectrum Analyser?

SWLtools ships an update every 2 months, and SDRFE Spectrum Analyser every 9 days. Most recently, SWLtools was updated on October 12, 2026 and SDRFE Spectrum Analyser on October 15, 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.*