Thank-you, Nik. Yes, I have made the same observation regarding file sizes. Further, examination of the Halide DNG output files in ExifTool is consistent with what I find for similar files from ProCamera (Cocologic) and CameraPixels, other third-party iPhone camera apps. In FastRawViewer, the histograms from sequential images from these cameras are essentially identical. In short, there is nothing to suggest that the Halide DNG files are anything but the usual single-shot DNG RAW files. The Halide Process Zero feature seems to be an in-app demosaicing algorithm that outputs HEIC or JPEG files, nothing more.