# SJ705M vs RF Engineer Toolkit

The clearest difference is in-app purchases: SJ705M at none against RF Engineer Toolkit's 3. SJ705M also leads on iOS requirement (14.0 vs 17.6). On price, ads 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. SJ705M asks for nothing beyond the download.

## The numbers

| Metric | SJ705M | RF Engineer Toolkit |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Freemium |
| Size | 6 MB | 12 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YOHAN KIM](https://appshunter.io/developer/1773645423) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### SJ705M

[App page](https://appshunter.io/ios/app/sj705m/id6736881242)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SJ705M free?

SJ705M is free to download, with no in-app purchases.

### Is RF Engineer Toolkit free?

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

### Do SJ705M or RF Engineer Toolkit have ads?

Neither SJ705M nor RF Engineer Toolkit shows ads.

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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.*