Comparison
SplitRig vs Dualgram
Both record two iPhone cameras at once. One forces ads and a watermark you must pay to remove; the other has no ads and a logo that comes off free in one tap.
TL;DR
SplitRig and Dualgram both record the front and rear iPhone cameras at the same time, in picture-in-picture or split screen. The difference is the free tier. Dualgram is free but shows ads, stamps a watermark on saved videos that you can only remove by paying, and locks some layouts behind a Pro purchase (a yearly subscription or a one-time unlock). SplitRig is free with no ads, no locked layouts, no subscription, no in-app purchases, and no account. SplitRig has an optional logo that comes off free in one tap. Dualgram markets up to 4K 60fps; SplitRig records Full HD 1080p HEVC but adds eight live GPS and metric overlays (speed, distance, altitude, pace) burned into the video, a built-in teleprompter, on-device Face Mode background removal, an AirPods Camera Remote, and Iron Stream thermal management for long shoots. Dualgram has the longer track record; SplitRig is the newer, actively updated, ad-free pick whose logo comes off in one tap.