# PSK31 vs hamsfi

The clearest difference is price: hamsfi at Free against PSK31's $2.99. hamsfi also leads on update cadence (every 2 months vs every 18 months). PSK31's advantage is chart position (#188 vs unranked) and iOS requirement (6.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

hamsfi is free to download; PSK31 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PSK31 ships an update every 18 months, hamsfi every 2 months. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PSK31 | hamsfi |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.6 (15 ratings)](https://appshunter.io/ios/app/psk31/id385619882/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 52.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | Paid | — |
| Best chart rank | **#188** | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **6.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Scott Earle](https://appshunter.io/developer/696420494) |

## What reviewers say

### PSK31

[App page](https://appshunter.io/ios/app/psk31/id385619882)

**Currently charting:** #188 Top Paid · Lifestyle (US App Store)

Decode and view ham radio PSK31 transmissions directly on your iPad. Tune into specific signals with a tap and see the decoded text, all without needing a separate computer. Features a waterfall display to visualize the audio spectrum.

**Highlights:** Monitor PSK31 transmissions, View decoded text, Waterfall display of audio spectrum, Tap to tune into signals, No computer required

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

**In-app purchases:** none


### hamsfi

[App page](https://appshunter.io/ios/app/hamsfi/id6774080740)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is PSK31 free?

PSK31 costs $2.99, with no in-app purchases.

### Is hamsfi free?

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

### Do PSK31 or hamsfi have ads?

Neither PSK31 nor hamsfi shows ads.

### Which is updated more often, PSK31 or hamsfi?

PSK31 ships an update every 18 months, and hamsfi every 2 months. Most recently, PSK31 was updated on October 2, 2026 and hamsfi on October 1, 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.*