How to combine videos on iPhone into one frame
"Combining videos" means two different things. Sequential merging plays clips one after another — iMovie handles that. This guide covers the other kind: merging videos so they play at the same time, together in one frame — a grid, a split screen, a side-by-side. That's what a video collage app is for.
Step by step
Pick the right tool for simultaneous merging
Install Video Grid Collage — free on the App Store, built specifically to combine up to 9 videos into one frame.
Import your videos
Add clips from your Photo Library or iCloud Files in any mix of lengths and orientations.
Choose how they share the screen
Two clips: side-by-side or stacked. Three to nine: grids and mixed layouts where one frame can be larger than the others.
Trim each video on the timeline
Every clip gets its own track with in/out points — decide exactly which segment of each video plays, and when it starts.
Frame it
Pick the output ratio (9:16, 1:1, 16:9 and more), then set spacing, corner radius and background color. Add text layers if the video needs context.
Export one combined video
Render in high quality with HDR support. The result is a single video file that plays everywhere.
When one-frame merging beats sequential merging
- Comparisons: viewers compare two things honestly only when both are on screen at once.
- Multi-angle moments: a concert, a goal, a trick — several phones, one synchronized frame.
- Recaps: nine short clips in a grid tell a month's story in fifteen seconds.
- Collabs: you and a friend in one frame without being in one place.
Try it yourself — free
Video Grid Collage · 4.8 on the App Store · combine up to 9 videos in one frame