Pexi.

Pexi is a focused utility for making picture-in-picture videos from your own clips. Choose a main video, add a second clip as a small overlay window, adjust its position and style, then export the final composition to your Photos album. Use Mixdesk to load two clips, preview the overlay, and render the result. Use Overlay Lab to fine-tune corner placement, safe margins, border, opacity, and rounded corners. Render Shelf keeps your local drafts and export records easy to reopen. Pexi is built for private, on-device editing workflows. Your projects are created from media you choose, and local records stay on your device unless you export them to Photos. The app does not include a public feed or preset content stream. Consumable Gem purchases are available for additional HD exports after free trials are used.