# Frequency Converter vs RF Engineer's Calc

The clearest difference is in-app purchases: RF Engineer's Calc at none against Frequency Converter's 3. RF Engineer's Calc also leads on update cadence (every 10 months vs every 64 months). Frequency Converter's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 16.1). On price and ads there is nothing between them.

Both are free to download. Frequency Converter sells 3 in-app purchases, starting at $0.99 per 7 days. RF Engineer's Calc asks for nothing beyond the download.

Frequency Converter ships an update every 64 months, RF Engineer's Calc every 10 months. The most recent releases landed on September 2, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Frequency Converter | RF Engineer's Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/frequency-converter/id1539673060/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 64 months | **Every 10 months** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 43 MB |
| Requires iOS | **13.4** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [GRAHAM JOHN SMITH](https://appshunter.io/developer/1668396908) |

## What reviewers say

### Frequency Converter

[App page](https://appshunter.io/ios/app/frequency-converter/id1539673060)

Easily convert frequencies between Hertz, Kilohertz, Megahertz, and Gigahertz. This tool is designed for builders, electricians, scientists, and anyone needing quick frequency conversions.

**Highlights:** Convert Hertz (Hz), Convert Kilohertz (kHz), Convert Megahertz (MHz), Convert Gigahertz (GHz), Fast conversions, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per 7 days |
| Premium Access | $1.99 | per month |
| Premium Access | $5.99 | per year |


### RF Engineer's Calc

[App page](https://appshunter.io/ios/app/rf-engineers-calc/id1668396906)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Converter free?

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

### Is RF Engineer's Calc free?

RF Engineer's Calc is free to download, with no in-app purchases.

### Do Frequency Converter or RF Engineer's Calc have ads?

Neither Frequency Converter nor RF Engineer's Calc shows ads.

### Which is updated more often, Frequency Converter or RF Engineer's Calc?

Frequency Converter ships an update every 64 months, and RF Engineer's Calc every 10 months. Most recently, Frequency Converter was updated on September 2, 2026 and RF Engineer's Calc on September 5, 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.*