Pretty good – RAW+ Pro DSLR Manual Camera Review

Allowed me to take a long exposure. Good! Should allow you to hide the white balance selector for less distraction, and allow you to export RAW files as JPEGs once they’ve already been taken. Otherwise you will need another app besides the native Photos app to deal with your files if you want any kind of noise reduction, as a 1/2 second ISO 1800 exposure from the iPhone XR camera will be unusably noisy without it.
Review by equallyinsunlightandfrost on RAW+ Pro DSLR Manual Camera.