LUT Lab vs Celvion Stack

A LUT (Look Up Table) is a simple file that lets you change the colors, tone, and contrast of photos/videos - like a universal color preset, compatible between different apps. LUT Lab is a handy tool that lets you visualize LUTs, use them to process any photo of your choice, and export to/from the most common LUT formats: .CUBE and HALD. It is a nifty companion tool for photographers and videographers, featuring: - Minimal and information dense interface - Full, interactive 3D cube visualizer - Before/After photo split viewer; load your own photos, export a LUT-processed version at native resolution. - Support for .CUBE (any size on input, up to 65×65×65 export) and HALD (TIFF/PNG, any rank) formats - Convert from .CUBE to HALD and from HALD to .CUBE; optionally resample .CUBE files for maximum compatibility with other apps - Supports desktop class features on iPad + Mac: multiple windows, drag & drop, keyboard shortcuts, open .CUBE files into LUT Lab straight from Finder/Files, etc. - Multiple color themes (one time in-app purchase required) - Extremely small app size: tons of functionality packed into only a couple megabytes. - Respects your privacy: no 3rd party libraries or tracking. Uses the latest iOS APIs so you only have to give minimal permissions for loading & saving files. If you have any questions, suggestions, need support, or for anything else, don't hesitate to reach out! contact@heliographe.net

Build a stronger image from a sequence of photos, right on your iPhone or iPad. Celvion Stack brings importing, frame review, alignment, stacking, editing, and export together in one on-device workflow. SIX WAYS TO STACK • Night scenes: combine exposures to reduce random noise while retaining natural detail. • Milky Way: align the sky separately from the foreground for sharper stars and a stable landscape. • Light trails: blend selected frames into continuous trails. • Smooth water and clouds: create a softer motion effect from a sequence. • Moving distractions: reduce the impact of people, vehicles, and other elements that appear in only some frames. • Landscapes: combine aligned frames for a cleaner result. CONTROL YOUR MILKY WAY STACK Choose a reference frame, review frame quality, adjust sky and foreground masks, and inspect which frames are included. These controls help you adapt the result to your source images. SUPPORTED RAW AND EVERYDAY PHOTOS Import supported RAW/DNG files and standard photos. RAW compatibility depends on the camera file and the available decoder. Lens correction applies geometric distortion profiles when a supported profile or embedded calibration matches; automatic vignetting and chromatic-aberration correction are not included. ON-DEVICE AI TOOLS Use optional AI denoising and up to 4× super-resolution on supported iPhone and iPad devices with iOS or iPadOS 18 or later. Results depend on the source image. Core stacking workflows require iOS or iPadOS 17 or later. FULL-RESOLUTION EXPORT Export as JPEG, PNG, 16-bit TIFF, or 10-bit HEIF. Choose available color-space and DPI options, then save locally to Files or, where supported, Photos. YOUR PHOTOS STAY ON YOUR DEVICE Photo processing runs on your device. The app does not upload your source photos for processing.