Comparison

PK vs AC Matrix

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PK

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
Read full description

With PK-Ink App, you can magically move permanent ink drawn on your mobile screen! Key Features • The spectator chooses the exact spot where the ink will appear. • The spectator can select from a variety of marker colors or designs — or you can upload your own drawings. • Move the drawing without touching the phone, using remote control or advanced hand-gesture recognition. Multiple gesture options included: pinch, index finger pointing, open-hand (5 fingers), and more — all highly reliable. • Multiple powerful finales: the spectator will be unable to erase the ink they just saw move. You start clean and end clean. • No internet connection required (unless you use integrations). • Integrate your favorite magic apps with an Ouija-style effect: Imagine the spectator searching for a word in apps like Inject or Elips, and the ink begins to move toward each letter or number — triggered by hand gestures, volume buttons, or fully automatic mode, gliding smoothly across the entire alphabet. Use this as a paranormal illusion with the built-in video animation feature, or as a psychic/magical effect by moving the ink across any Ouija board image you’ve downloaded. • Video instructions available in English and Spanish. • Extremely easy to use — no complex setup or configuration required.

About

AC Matrix

Features
Read full description

AC Matrix turns your phone into a magic instrument. Everything an audience sees looks like an ordinary phone doing ordinary things. Everything you do to control it is invisible. SLIDE EFFECTS Flash through your own screenshots and clips, full-screen. Because the media is yours, the effect can be anything a phone screen can show — a home screen where the icons gather into one corner, a photo that changes when you turn the phone around, a lock screen that shouldn't exist yet. • Cut instantly, or cross-dissolve over a length you choose • Hold a slide for a set delay before it changes • Let a slide advance itself, so a beat lands on time and not a moment late • Name your slides so a long routine stays readable while you build it TRIGGER IT HOWEVER YOU LIKE Every slide chooses its own way in: a tap anywhere on the screen, a shake of the phone, or a hand gesture seen by the camera. Mix them inside one routine — tap, tap, shake, pinch — so no single tell repeats. AI CLEANUP, ON DEVICE Box out a clock, a notification, a status bar, anything that gives the game away. An inpainting model rebuilds the area from its surroundings, on your phone, and stores the cleaned copy alongside the original. One toggle switches between them. Works on stills and on video, either as a single patch or frame by frame. Cleanup runs in the background with a Live Activity, so you can watch a long job finish from the Lock Screen instead of holding the app open. BUILT FOR PERFORMING • Two-finger swipe down to leave — there is no visible quit button, and that is the point • Swipe right to step back a slide if you need to • The screen stays awake and the status bar stays hidden • Open the app straight into a performance, so nothing is ever seen but the effect LEARN IT BY WATCHING IT Every setting that describes a behaviour over time is shown as a small looping animation, not a paragraph. A "?" next to any control opens the tutorial already scrolled to the right topic. There is a filmed clip of one routine being performed, start to finish, if you would rather just watch one first. PRIVATE BY CONSTRUCTION AC Matrix has no network code functionality. Nothing is uploaded, nothing is analysed, no account is required. Camera frames are read for hand detection and discarded — never recorded, never saved, never sent. The AI cleanup model runs entirely on your device. Requires iOS 17 or later. Camera gesture triggers need a physical iPhone.

Screenshots

PK4 screens
AC Matrix4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 7 level
PK versus AC Matrix: the parameters behind the verdict, then further details
ParameterPKAC Matrix
Price$99.99Free — better
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
Best chart rank#160 — better—
DevicesiPhoneiPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size16 MB261 MB
Age rating4+4+
DeveloperNelson Suarez ArteagaFeiyu Chang

In-app purchases

None

PK

No in-app purchases

1 purchases

AC Matrix

One-time1
  • AC Matrix Pro$4.99

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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