# RF Engineer Toolkit vs Ondaris

The clearest difference is update cadence: Ondaris at every 2 weeks against RF Engineer Toolkit's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RF Engineer Toolkit sells 3 in-app purchases, starting at $0.99 per month and Ondaris sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

RF Engineer Toolkit ships an update every 2 months, Ondaris every 2 weeks. The most recent releases landed on November 5, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | RF Engineer Toolkit | Ondaris |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 12 MB | 52 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) | [SCOPT Inc.](https://appshunter.io/developer/6808941647) |

## 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 |


### Ondaris

[App page](https://appshunter.io/ios/app/ondaris/id6808941525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ondaris Pro | $12.99 | one-time |


## Frequently asked questions

### Is RF Engineer Toolkit free?

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

### Is Ondaris free?

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

### Do RF Engineer Toolkit or Ondaris have ads?

Neither RF Engineer Toolkit nor Ondaris shows ads.

### Which is updated more often, RF Engineer Toolkit or Ondaris?

RF Engineer Toolkit ships an update every 2 months, and Ondaris every 2 weeks. Most recently, RF Engineer Toolkit was updated on November 5, 2026 and Ondaris on October 26, 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.*