# PortKnock vs WorldNet CX

The clearest difference is price: WorldNet CX at Free against PortKnock's $0.99. WorldNet CX also leads on iOS requirement (16.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

WorldNet CX is free to download; PortKnock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PortKnock ships an update every 7 months, WorldNet CX every 3 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | PortKnock | WorldNet CX |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/portknock/id358353536/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 76.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 11 MB | 51 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Danny Sung](https://appshunter.io/developer/1555969244) | [WorldNet Telecommunications](https://appshunter.io/developer/1188510962) |

## What reviewers say

### PortKnock

[App page](https://appshunter.io/ios/app/portknock/id358353536)

This utility allows network administrators to send custom port knock sequences to servers. It requires a port knock daemon on the server and offers features like password protection, knock validation, and host management.

**Highlights:** Password Protection, Knock Validation, Import/Export Hosts, Auto App Launcher, Shows External IP Address, TCP/UDP Configuration

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

**In-app purchases:** none


### WorldNet CX

[App page](https://appshunter.io/ios/app/worldnet-cx/id6448111704)

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

**In-app purchases:** none


## Frequently asked questions

### Is PortKnock free?

PortKnock costs $0.99, with no in-app purchases.

### Is WorldNet CX free?

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

### Do PortKnock or WorldNet CX have ads?

Neither PortKnock nor WorldNet CX shows ads.

### Which is updated more often, PortKnock or WorldNet CX?

PortKnock ships an update every 7 months, and WorldNet CX every 3 months. Most recently, PortKnock was updated on November 10, 2026 and WorldNet CX on November 7, 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.*