# RF Engineer Toolkit vs Smith Designer Lite

The clearest difference is in-app purchases: Smith Designer Lite at none against RF Engineer Toolkit's 3. Smith Designer Lite also leads on update cadence (weekly vs every 2 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. RF Engineer Toolkit sells 3 in-app purchases, starting at $0.99 per month. Smith Designer Lite asks for nothing beyond the download.

RF Engineer Toolkit ships an update every 2 months, Smith Designer Lite weekly. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | RF Engineer Toolkit | Smith Designer Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rf-engineer-toolkit/id6745524609/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Freemium | — |
| Size | 12 MB | 40 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) | [Morten Vinding](https://appshunter.io/developer/6782186078) |

## What reviewers say

### RF Engineer Toolkit

[App page](https://appshunter.io/ios/app/rf-engineer-toolkit/id6745524609)

This app provides a comprehensive suite of 45 RF and antenna calculators for engineers and technicians. It offers unit-tested formulas for field, site, and lab calculations, including RF exposure and impedance matching. A free version offers 16 calculators, with Pro unlocking all features and advanced options.

**Highlights:** 45 RF and antenna calculators, Unit-tested formulas against industry standards, Field and site calculations (VSWR, link budget, RF exposure), Design and lab calculations (Smith chart, impedance matching, filters), Everyday RF conversions (dBm, W, V), Free version with 16 calculators, Pro version with full access and advanced features

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $4.99 | per year |
| Remove ADS | $9.99 | one-time |


### Smith Designer Lite

[App page](https://appshunter.io/ios/app/smith-designer-lite/id6782214316)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RF Engineer Toolkit free?

RF Engineer Toolkit is free to download, with in-app purchases available.

### Is Smith Designer Lite free?

Smith Designer Lite is free to download, with no in-app purchases.

### Do RF Engineer Toolkit or Smith Designer Lite have ads?

Neither RF Engineer Toolkit nor Smith Designer Lite shows ads.

### Which is updated more often, RF Engineer Toolkit or Smith Designer Lite?

RF Engineer Toolkit ships an update every 2 months, and Smith Designer Lite weekly. Most recently, RF Engineer Toolkit was updated on November 5, 2026 and Smith Designer Lite on November 10, 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.*