# SUNSCAN vs PhosphorRTTY

The clearest difference is price: SUNSCAN at Free against PhosphorRTTY's $0.99. SUNSCAN also leads on update cadence (every 2 weeks vs every 7 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

SUNSCAN is free to download; PhosphorRTTY costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SUNSCAN ships an update every 2 weeks, PhosphorRTTY every 7 months. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SUNSCAN | PhosphorRTTY |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | — | Paid |
| Size | 48 MB | 3 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [STAROS](https://appshunter.io/developer/1768267881) | [Stuart Woolley](https://appshunter.io/developer/315697638) |

## What reviewers say

### SUNSCAN

[App page](https://appshunter.io/ios/app/sunscan/id6680193688)

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

**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 SUNSCAN free?

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

### Is PhosphorRTTY free?

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

### Do SUNSCAN or PhosphorRTTY have ads?

Neither SUNSCAN nor PhosphorRTTY shows ads.

### Which is updated more often, SUNSCAN or PhosphorRTTY?

SUNSCAN ships an update every 2 weeks, and PhosphorRTTY every 7 months. Most recently, SUNSCAN was updated on September 30, 2026 and PhosphorRTTY on October 7, 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.*