# Screen Prep: VFX Track Marks — Screen Colors & Tracking Marks

> Screen Colors & Tracking Marks (iPhone/iPad app by Squirrel FX LLC.)

- Source: https://appshunter.io/ios/app/screen-prep-vfx-track-marks/id1587599450 (this page in markdown: same URL + `.md`)
- Developer: [Squirrel FX LLC](https://appshunter.io/developer/1557764202)
- Category: Utilities, Photo & Video
- Price: $9.99
- Age rating: 4+
- Requires: iOS 16.0 · 3 MB
- Languages: English
- Released: 2021-10-14
- Data updated: 2026-10-24

## What is Screen Prep?

Screen Prep readies any iPhone, iPad, or Apple Watch for VFX screen replacement. Fill the display with a chroma key color, add tracking marks, and lock it down so your compositor gets a screen that's easy to key and track.

• Choose from preset chroma colors or pick your own with a color wheel
• Add tracking marks and adjust their position, size, and color
• AddAdded: Tracking marks can scroll vertically, horizontally or both, and pinch to zoom, so actors can scroll the screen
• Frame marks for the full screen, 16:9, or an Apple Watch display
• Display color bars, a grid, or a checkerboard instead
• Lock the screen so actors can't trigger the controls by accident
• Save setups and recall them in a tap
• Export a 16:9 image to Photos to show on a TV or monitor via AirPlay

APPLE WATCH
Send saved screens to Apple Watch. Swipe or turn the Digital Crown to choose one, then double tap to lock it while the actor wears the watch.

WORKS EVERYWHERE
In addition to iPhone, Screen Prep supports portrait and landscape on iPad, the outer and open screens of iPhone Duo, and full screen on Apple silicon Macs. Need it on another screen? Export an image, then transfer it or AirPlay it to a TV or another display.

A built-in Manual covers every feature.

Site and Privacy Policy: https://squirrelfx.llc/screen-prep.html

## Is Screen Prep safe?

Not enough ratings yet to assess Screen Prep.

## Is Screen Prep legit?

Screen Prep: VFX Track Marks appears to be a legitimate app. The AppsHunter Legitimacy Score for Screen Prep is 80 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 20261020.04 — 2026-10-21

Major Update:

      • Added: Apple Watch app. Screens saved with the new Watch frame are sent to the watch, where you swipe or turn the Digital Crown to choose one and double tap to lock it.

      • Added: Tracking marks have a Frame setting: Full, Watch or 16:9. Watch outlines an Apple Watch screen and sizes the marks as they'll look on the watch.

      • Added: Tracking marks can scroll vertically, horizontally or both, and pinch to zoom, so actors can scroll the screen. They repeat endlessly, or start at the top-left and bounce there. Triple tap to put them back. Saved Watch screens scroll on the watch once it's locked.

      • Added: Saved screens remember their Frame and scroll settings.

      • Added: iPhone Duo support. Screen Prep fills the outer screen and the full open screen.

      • Added: Landscape on iPad and the open iPhone Duo, with the controls on the right side of the screen.

      • Added: Runs on Apple silicon Macs and fills the display edge to edge in full screen.

      • Added: A Manual, in About, covering every panel. It replaces Help.

      • Improved: Controls resize when the window changes size, from folding, rotating, or resizing windows.

      • Improved: Grab 16:9 Image is more reliable, crops to a true 16:9 on every device, and doesn't rotate screens that are already landscape.

      • Improved: Better performance while the color wheels are open.

      • Improved: Saved screens keep the same identity between launches.

      • Fixed: With the 16:9 frame, tracking marks could go off the screen on wider displays.

      • Fixed: The tracking mark color and custom screen color are now remembered between launches.

      • Fixed: The custom color wheel didn't respond to some greens and blues, and its brightness slider was applied twice.

      • Fixed: Adjusting the screen color wheel could change the tracking mark color.

      • Fixed: Opening the color picker for the first time made the screen one stop brighter.

      • Updated for iOS 27 and watchOS 27.

### 20251211.01 — 2025-12-12

iOS 26 Age Verification Compatibility.

### 20230913.01 — 2023-09-20

• iOS 17 Compatability

### 20230508.01 — 2023-05-09

Fixed Color settings not showing
Fixed Color Wheel bugs

### 20221229.01 — 2022-12-29

Updated email in About.

## Apps similar to Screen Prep

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Fix in Post](https://appshunter.io/ios/app/fix-in-post/id1626760669) | — | Free | Utilities |
| [Tracking Marker by DPBOX](https://appshunter.io/ios/app/tracking-marker-by-dpbox/id6745626443) | — | Free | Utilities |
| [m-BER](https://appshunter.io/ios/app/m-ber/id6740215628) | 5.0 (1) | Free | Utilities |
| [reCHycle](https://appshunter.io/ios/app/rechycle/id1548467184) | — | Free | Utilities |
| [GVM Link](https://appshunter.io/ios/app/gvm-link/id6727010435) | — | Free | Utilities |

## More apps by Squirrel FX LLC

- [Alarum: Gentle Alarm Clock](https://appshunter.io/ios/app/alarum-gentle-alarm-clock/id1557764200)
- [HDRI Prep: VFX HDR Brackets](https://appshunter.io/ios/app/hdri-prep-vfx-hdr-brackets/id1616103466)

All apps by Squirrel FX LLC: https://appshunter.io/developer/1557764202

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*