Seam joins your videos into one — fast, clean, and 100% on your device. Pick your clips, stitch them together, and export in up to 4K. No account, no watermark, no ads, and not a single frame ever leaves your iPhone. Seam isn't a bloated editor. It does one job — merging videos — and does it exceptionally fast and exceptionally privately. WHY YOU'LL LOVE IT • Merge up to 30 clips into one video in just a few taps • Drag to reorder until the sequence is exactly right • Trim every clip with a precise filmstrip scrubber and frame-by-frame handles • Smooth transitions between clips — crossfade or dip-to-black • Add a music bed from your Files, set per-clip volume, fade in and out • Pick your canvas — Original, 16:9, 9:16, 1:1 or 4:5 — with Fit or Fill • Export in 720p, 1080p or 4K, H.264 or HEVC, at 24/30/60 fps • Preview the full result — transitions and audio — before you export • Save straight to Photos or share it anywhere PRIVATE BY DESIGN Everything happens on-device with Apple's own frameworks. Seam makes no network requests, so its App Store privacy label reads "Data Not Collected." It works perfectly in Airplane Mode. Your original videos are never modified, and the only permission Seam ever asks for is adding your finished video to Photos. PERFECT FOR • Family and event videos you'd rather not upload to the cloud • Creators pre-assembling raw footage before a full edit • Professionals (legal, medical, security, field work) who can't upload footage • Anyone on a plane or off the grid — Seam is offline by design NO CATCH • No watermark on your video, ever • No subscription, no account, no sign-in • No ads, no tracking Merge your moments into one. Download Seam and stitch your first video in seconds.