Comparison
SplitRig vs 2Cam Front+Back
The simplest free option vs the most full-featured free option. Different jobs.
TL;DR
2Cam Front+Back is the simplest dual-camera iPhone app — just front and rear in two windows, a couple of layouts, ad-supported. Fine for a one-off shot. SplitRig is built for creators who record more than occasionally: four layout modes (including Face Mode background removal), eight live overlays, Action Cam at 60 fps, Apple Watch + AirPods remote, hardware button shutter. Both free, but SplitRig has no ads and dramatically more features.