# Feld Hellschreiber vs On

The clearest difference is price: On at Free against Feld Hellschreiber's $2.99. On also leads on rating (4.4 vs 2.8) and update cadence (monthly vs every 13 months). Feld Hellschreiber's advantage is review sentiment (75% vs 50%) and iOS requirement (6.0 vs 15.6). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

On holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 5 and 13 respectively. Written reviews complicate that: 75% of Feld Hellschreiber's written reviews are positive against 50% of On'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, On monthly. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Feld Hellschreiber | On |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/feld-hellschreiber/id650758963/reviews) | **[4.4 (13 ratings)](https://appshunter.io/ios/app/on-air-net-scraper/id1536271710/reviews)** |
| Number of ratings | 5 | **13** |
| Positive reviews | **75.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 30 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Christopher Robson](https://appshunter.io/developer/1536271712) |

## 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


### On

[App page](https://appshunter.io/ios/app/on-air-net-scraper/id1536271710)

This tool assists amateur radio operators with managing on-air nets and check-ins. It offers real-time messaging, email integration, and detailed operator information retrieval. The app supports multiple simultaneous sessions and configurable displays for efficient communication and tracking.

**Highlights:** Real-time net check-in tracking, Instant messaging (AIM) sessions, Integrated email client, Configurable information displays, QRZ/QRZCQ call sign lookup, WebSDR audio streaming, QRZ Logbook integration

**In-app purchases:** none


## Frequently asked questions

### Is Feld Hellschreiber free?

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

### Is On free?

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

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

On is rated higher. Feld Hellschreiber averages 2.8 out of 5 from 5 ratings, while On averages 4.4 from 13 ratings.

### Do Feld Hellschreiber or On have ads?

Neither Feld Hellschreiber nor On shows ads.

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

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