Nick Heer, writing for The Sweet Setup:
We’ve tested about a dozen highly-rated third-party camera apps we’ve found in the App Store that have come recommended by photographers and enthusiasts alike, and we think the best option for most people is Halide. It was a tough call, but it delivers a great balance of all of the features you want in a third-party camera app.
I just started using Halide last week and I agree with Nick, it’s the best third-party camera app for the iPhone. I used it alongside Darkroom to take a bunch of photos at a local street painting festival and I was thoroughly impressed with the results. If you’re interested, I published several of them on Instagram.