Screen Prep: VFX Track Marks

Chroma Key & Tracking Markers

$9.99 · Designed for iPad. Not verified for macOS.

New: Apple Watch app, iPhone Duo support, landscape on iPad, and Apple silicon Macs. Prep every screen on set—phone, tablet, or wrist—for clean screen replacement. 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

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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.

Version 20261020.04

The developer, Squirrel FX LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Squirrel FX LLC
    Size
    3.2 MB
    Category
    Utilities
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • iPad
      Requires iPadOS 16.0 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    • Apple Watch
      Requires watchOS 11.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2021-2026 Daniel Mellitz
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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