Steve Dent for Engadget We may receive a commission on purchases made from links. There are several reasons that droves of creators have adopted the Blackmagic Camera app in place of the iPhone's native camera. For one, it offers options demanded by pros like full manual control, ProRes video capture and scopes for monitoring video. Most importantly though, it's totally free, unlike rival camera apps from VSCO, Adobe and others. Since iPhone creators don't usually have a camera crew, Blackmagic Design is offering some help with its latest version 3.3 update . You can now control the app from your wrist thanks to a new Apple Watch app that lets you do things like monitor video, start and stop recording and apply LUTs. To check out the new features, I took a fresh look at Blackmagic's app, and it's now incredibly impressive. Why use the app? The native iPhone camera is powerful enough for most users, but lacks features needed for more creative work.…