Comparison
SplitRig vs Apple Dual Capture
Apple's built-in Camera mode is iPhone-17-only and locked to picture-in-picture. SplitRig works on every iPhone you already own.
TL;DR
Apple's native Dual Capture, introduced with iOS 26 on the iPhone 17 lineup, records front and back cameras at the same time. It only works on iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air, and only in a single locked picture-in-picture layout (small front overlay, large rear). It does record up to 4K and is built into the stock Camera app, which is hard to beat for convenience if you own one of those phones. SplitRig is the alternative for everyone else: it supports iPhone 11 through iPhone 17 Pro, offers four layout modes (PiP, Split Screen, Single, Face Mode background removal), eight live GPS / metrics overlays burned into the recording, an Apple Watch companion, AirPods Camera Remote, and an Iron Stream thermal governor. All free.