# iSlipstick RF vs KTrunk

The clearest difference is review sentiment: iSlipstick RF at 100% against KTrunk's 50%. iSlipstick RF also leads on in-app purchases (none vs 3) and iOS requirement (16.6 vs 18.0). KTrunk's advantage is update cadence (monthly vs every 10 months) and rating (5.0 vs 4.7). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. KTrunk sells 3 one-off in-app purchases. iSlipstick RF asks for nothing beyond the download.

KTrunk holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews complicate that: 100% of iSlipstick RF's written reviews are positive against 50% of KTrunk's, so the app with the better star average is not the one people write more warmly about.

iSlipstick RF ships an update every 10 months, KTrunk monthly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | iSlipstick RF | KTrunk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/islipstick-rf/id351775311/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ktrunk/id1543722029/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 10 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Sam Virgillo](https://appshunter.io/developer/324560825) | [Clemens Schuetzdeller](https://appshunter.io/developer/1543722031) |

## What reviewers say

### iSlipstick RF

[App page](https://appshunter.io/ios/app/islipstick-rf/id351775311)

This app provides a comprehensive suite of calculators and converters specifically designed for radio frequency (RF) engineers and technicians. It includes tools for path loss, antenna gain, intermodulation, and standard electrical calculations, along with various unit conversions.

**Highlights:** RF-specific calculators, Standard electrical calculators, Unit converters, Path loss calculation, Intermodulation analysis, Antenna gain and beamwidth

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

**In-app purchases:** none


### KTrunk

[App page](https://appshunter.io/ios/app/ktrunk/id1543722029)

This note-taking app allows you to save ideas with attached files and photos. You can create links between notes and files, and synchronize your data across devices. An optional in-app purchase enables note encryption for enhanced privacy.

**Highlights:** Save ideas with files and photos, Link notes to other notes and files, Synchronize across devices via iCloud, Notes saved in HTML format, Optional note encryption

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Operating Convenience | $0.99 | one-time |
| Privacy | $1.99 | one-time |
| #Tag-Proposals | $1.99 | one-time |


## Frequently asked questions

### Is iSlipstick RF free?

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

### Is KTrunk free?

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

### Which has better reviews, iSlipstick RF or KTrunk?

KTrunk is rated higher. iSlipstick RF averages 4.7 out of 5 from 3 ratings, while KTrunk averages 5.0 from 2 ratings.

### Do iSlipstick RF or KTrunk have ads?

Neither iSlipstick RF nor KTrunk shows ads.

### Which is updated more often, iSlipstick RF or KTrunk?

iSlipstick RF ships an update every 10 months, and KTrunk monthly. Most recently, iSlipstick RF was updated on October 16, 2026 and KTrunk on October 14, 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.*