Orange background with the word 'prefix' written in cream-colored, bold, lowercase letters.

On-set prop screens, built for production.

prefx is a professional iPhone app designed for film and TV sets. Swap screen colors instantly, set motion tracking markers, and load custom UI templates — social feeds, news layouts, streaming interfaces — so every prop screen in frame looks exactly right, every take.

Built by filmmakers. Available on the App Store.

Apple App Store download button with the Apple logo and text
Mobile phone screen displaying app themes with a red background and various app options, including 'Strike Up', 'Tribune', 'CineVault', and 'Chatterbox', along with a navigation menu at the bottom.
A smartphone displaying a chat conversation with an AI assistant about outlining screenplays and writing methods for thrillers, with orange background and a dark chat interface.
Mobile device displaying a news app with the headline "Global Leaders Convene Emergency Climate Summit in Geneva" and an image of a large conference room filled with people. The app interface features sections for different news categories such as world, finance, technology, and local.
screenshot of a mobile app interface called Chatterbox, which is a scripted messenger with timed, realistic replies and an action feature, showing a script timeline with messages and editing options.
A QR code with the Prefix app logo in the center.

Release Notes

What’s New in 1.6.9

Operator Beta

  • Fake Phone OS — home screen, status bar, contacts, messages, mail

  • Blackbox & Go timers — fire on cue

  • Live scripted conversations via Chatterbox

  • Timed notification banner → opens scripted chat

CineVault

  • Poster accent colors fixed

  • Frame editor drag + face detect fixed

Performance

  • Timer crash fix (real device stable)

  • Keyboard avoidance in messages

1.7 coming soon!