# Feld Hellschreiber vs ST

The clearest difference is price: ST at Free against Feld Hellschreiber's $2.99. ST also leads on rating (5.0 vs 2.8). Feld Hellschreiber's advantage is review sentiment (75% vs 50%) and update cadence (every 13 months vs every 27 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

ST holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews complicate that: 75% of Feld Hellschreiber's written reviews are positive against 50% of ST's, so the app with the better star average is not the one people write more warmly about.

Feld Hellschreiber ships an update every 13 months, ST every 27 months. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Feld Hellschreiber | ST |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/feld-hellschreiber/id650758963/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/st-4001i/id1492225169/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | **75.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 13 months** | Every 27 months |
| Monetization | Paid | **Free** |
| Size | 4 MB | 12 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [ICOM INCORPORATED](https://appshunter.io/developer/1193842631) |

## What reviewers say

### Feld Hellschreiber

[App page](https://appshunter.io/ios/app/feld-hellschreiber/id650758963)

This app decodes and transmits text messages using the historical Hellschreiber system, which sends characters as audio signals. It's ideal for amateur radio operators and enthusiasts interested in vintage communication methods. The app allows for both manual text entry and pre-set messages, with adjustable display contrast for optimal viewing.

**Highlights:** Decode Hellschreiber messages, Transmit text messages, Canned text message support, Adjustable display contrast, Real-time text scrolling, Audio input/output via device mic/speaker

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

**In-app purchases:** none


### ST

[App page](https://appshunter.io/ios/app/st-4001i/id1492225169)

This app converts photos and images into a format compatible with D-STAR transceivers for the Share Picture function. Users can crop images, add text like call signs, and transfer them wirelessly or via Bluetooth to supported transceivers.

**Highlights:** Image conversion for D-STAR Share Picture, Image cropping, Add text (call signs), Wireless transfer to transceiver, Bluetooth transfer to transceiver, Save cropped image as file

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Feld Hellschreiber free?

Feld Hellschreiber costs $2.99, with no in-app purchases.

### Is ST free?

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

### Which has better reviews, Feld Hellschreiber or ST?

ST is rated higher. Feld Hellschreiber averages 2.8 out of 5 from 5 ratings, while ST averages 5.0 from 2 ratings.

### Do Feld Hellschreiber or ST have ads?

Neither Feld Hellschreiber nor ST shows ads.

### Which is updated more often, Feld Hellschreiber or ST?

Feld Hellschreiber ships an update every 13 months, and ST every 27 months. Most recently, Feld Hellschreiber was updated on October 8, 2026 and ST on October 9, 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.*