# PK vs AC Matrix

The clearest difference is price: AC Matrix at Free against PK's $99.99. AC Matrix also leads on update cadence (every 4 days vs every 2 months). PK's advantage is in-app purchases (none vs 1) and chart position (#160 vs unranked). On ads, device support and iOS requirement there is nothing between them.

AC Matrix is free to download; PK costs $99.99 up front. AC Matrix sells 1 one-off in-app purchase. PK asks for nothing beyond the download.

PK ships an update every 2 months, AC Matrix every 4 days. The most recent releases landed on October 27, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | PK | AC Matrix |
| --- | --- | --- |
| Price | $99.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pk-ink-pro/id6717616357/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Paid | — |
| Best chart rank | **#160** | — |
| Size | 16 MB | 261 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nelson Suarez Arteaga](https://appshunter.io/developer/1692733605) | [Feiyu Chang](https://appshunter.io/developer/1492595678) |

## What reviewers say

### PK

[App page](https://appshunter.io/ios/app/pk-ink-pro/id6717616357)

**Currently charting:** #160 Top Paid · Entertainment (US App Store)

Create a paranormal illusion by magically moving permanent ink on your mobile screen. Spectators choose ink placement and color, and you control the movement remotely or with hand gestures. Offers multiple finales and can integrate with other magic apps for advanced effects.

**Highlights:** Spectator-chosen ink placement, Customizable marker colors and designs, Remote control and hand-gesture recognition, Multiple powerful finales, Offline functionality, Integration with other magic apps

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

**In-app purchases:** none


### AC Matrix

[App page](https://appshunter.io/ios/app/ac-matrix/id6802479628)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AC Matrix Pro | $4.99 | one-time |


## Frequently asked questions

### Is PK free?

PK costs $99.99, with no in-app purchases.

### Is AC Matrix free?

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

### Do PK or AC Matrix have ads?

Neither PK nor AC Matrix shows ads.

### Which is updated more often, PK or AC Matrix?

PK ships an update every 2 months, and AC Matrix every 4 days. Most recently, PK was updated on October 27, 2026 and AC Matrix 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.*