iPhone: iOS 10 introduced the ability for third-party apps to shoot and edit in the lossless RAW format. Today, the popular editing tool VSCO adds that support.
The RAW image support extends to capture, importing, and editing. So, if you shoot RAW on your DSLR camera, you can bring it into the VSCO app to edit, or just shoot in RAW from your iPhone. The update also adds in a new set of advanced controls called Film X. These are meant to emulate different models of film and are fully customisable, though you'll need to sign up for VSCO's paid subscription service to make use of it.