# Maidenhead Converter vs SDR

The clearest difference is price: Maidenhead Converter at Free against SDR's $44.99. Maidenhead Converter also leads on rating (4.8 vs 4.6) and device support (3 vs 1). SDR's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 7 months). On review sentiment and ads there is nothing between them.

Maidenhead Converter is free to download; SDR costs $44.99 up front. Maidenhead Converter sells 1 one-off in-app purchase. SDR asks for nothing beyond the download.

Maidenhead Converter holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: SDR has 67 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 86% of Maidenhead Converter's written reviews are positive against 84% of SDR's.

Maidenhead Converter ships an update every 7 months, SDR every 2 weeks. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Maidenhead Converter | SDR |
| --- | --- | --- |
| Price | **Free** | $44.99 |
| Rating | **[4.8 (13 ratings)](https://appshunter.io/ios/app/maidenhead-converter/id313870236/reviews)** | [4.6 (67 ratings)](https://appshunter.io/ios/app/sdr-control-mobile/id1673327509/reviews) |
| Number of ratings | 13 | **67** |
| Positive reviews | **86.2% of reviews** | 84.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#143** |
| Size | 15 MB | 55 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Donald Hays](https://appshunter.io/developer/313870239) | [Marcus Roskosch](https://appshunter.io/developer/334053438) |

## What reviewers say

### Maidenhead Converter

[App page](https://appshunter.io/ios/app/maidenhead-converter/id313870236)

Easily convert between latitude/longitude and Maidenhead Grid Locator System coordinates. Track your current location in both formats simultaneously and visualize them on a map. Ideal for amateur radio operators and anyone needing a concise way to express geographic positions.

**Highlights:** Latitude/Longitude to Maidenhead conversion, Maidenhead to Latitude/Longitude conversion, Real-time location tracking, Map visualization, Input coordinates for conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Disabler | $1.99 | one-time |


### SDR

[App page](https://appshunter.io/ios/app/sdr-control-mobile/id1673327509)

**Currently charting:** #143 Top Paid · Utilities (US App Store)

Control your Icom radio remotely from your iPhone. View spectrum scope, waterfall, and access all radio controls over Wi-Fi or the internet. Supports various Icom models and includes features for ham radio operators.

**Highlights:** Spectrum scope and waterfall display, Full radio control, Remote operation over Wi-Fi/internet, FT8-Improved and JS8 modes, CW decoder and keyer, Speech transcription and translation, Logbook with ADIF import/export

**Features:** iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 🚀 Works perfectly with ICOM radios
- 👍 Intuitive and easy to use
- 🌟 Feature-rich and comprehensive
- 💯 Stable and reliable performance
- 📱 Great for remote operation

**What reviewers complain about**

- 🐛 FT8 decoding issues (lower signal levels)
- 🐛 Dialogs do not scale with larger text setting
- 🐛 UI elements can be cramped on iPhone
- 🐛 Some buttons are small and hard to press
- 🐛 Frequency display overlaps buttons

**Reported bugs**

- Dialogs do not scale with larger text setting
- Frequency display overlaps buttons
- FT8 decoding issues (lower signal levels than WSJTX)
- App crashes and leaves radio in transmit
- Logbook export not functional after update

**Requested features**

- Develop for IC-7800
- CarPlay support
- Apple Watch add-on
- Windows version
- JS8call support


## Frequently asked questions

### Is Maidenhead Converter free?

Maidenhead Converter is free to download, with in-app purchases available.

### Is SDR free?

SDR costs $44.99, with no in-app purchases.

### Which has better reviews, Maidenhead Converter or SDR?

Maidenhead Converter is rated higher. Maidenhead Converter averages 4.8 out of 5 from 13 ratings, while SDR averages 4.6 from 67 ratings.

### Do Maidenhead Converter or SDR have ads?

Neither Maidenhead Converter nor SDR shows ads.

### Which is updated more often, Maidenhead Converter or SDR?

Maidenhead Converter ships an update every 7 months, and SDR every 2 weeks. Most recently, Maidenhead Converter was updated on October 23, 2026 and SDR on October 30, 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.*