# TLK SmartLock vs RF Engineer Toolkit

The clearest difference is in-app purchases: TLK SmartLock at none against RF Engineer Toolkit's 3. TLK SmartLock also leads on iOS requirement (12.0 vs 17.6). On price, update cadence, 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. TLK SmartLock asks for nothing beyond the download.

TLK SmartLock ships an update every 3 months, RF Engineer Toolkit every 2 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | TLK SmartLock | 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 3 months | **Every 2 months** |
| Monetization | — | Freemium |
| Size | 41 MB | 12 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [C3Ware MultiCall Technologies Private Limited](https://appshunter.io/developer/1441765777) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### TLK SmartLock

[App page](https://appshunter.io/ios/app/tlk-smartlock/id6736612140)

**Features:** macOS Compatibility

**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 TLK SmartLock free?

TLK SmartLock 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 TLK SmartLock or RF Engineer Toolkit have ads?

Neither TLK SmartLock nor RF Engineer Toolkit shows ads.

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

TLK SmartLock ships an update every 3 months, and RF Engineer Toolkit every 2 months. Most recently, TLK SmartLock was updated on October 30, 2026 and RF Engineer Toolkit on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*