iMovie, Apple’s basic video editing app, with 4K support, titles, effects/filters, etc., runs on both macOS and iOS.
iMovie 10.1.14 is a free download for macOS 10.14.6 or later with bug fixes in the most recent Apple update.
iMovie 2.2.9 is a free download for iOS 13.4 with some additional capabilities and bug fixes in a new release:
• Use iMovie on iPad with Magic Keyboard, a mouse, or a trackpad for a new way to create movies and trailers (requires iPadOS 13.4)
• Use keyboard shortcuts to toggle between the five inspector modes when a clip is selected: Action, Speed adjustments, Volume, Titles, and Filters
• Use keyboard shortcuts to quickly rotate video 90-degrees clockwise or counterclockwise
• Tap the Download All button at the top of the soundtracks list to download all bundled soundtracks at once
• Add PNG, GIF, TIFF, and BMP files to your movie
• Performance and stability improvements