Three steps to a night-sky stack: add a frame sequence, paint a sky mask, run the stack and export. Three professional presets cover the Milky Way, star trails and outlier rejection (a median stack that removes aircraft, satellites, people and clouds), with a √N noise report, a batch queue and a frame-residency budget that adapts to the memory of your device.
Input: RAW straight from the camera (CR2/CR3/ARW/NEF/RAF/ORF/RW2/DNG, decoded by LibRaw to 16-bit linear) plus 16-bit TIFF, 32-bit float, EXR and 16-bit PNG. Output: 16-bit TIFF/JPEG or 32-bit float TIFF/EXR/PNG16, with EXIF (GPS included) written back. Everything is processed on your own machine — photos are never uploaded.