darktable vs Nitro

darktable is a free photography workflow application for organizing digital negatives and developing raw images. It stores images in a database and provides a zoomable lighttable, while its editing leaves original files unchanged. It imports standard, raw and high dynamic range formats such as JPEG, CR2, NEF, HDR, PFM and RAF. Color tools include automatic display-profile detection on most systems and built-in ICC profiles for sRGB, Adobe RGB, XYZ and linear RGB. Many operations can use OpenCL GPU acceleration, and tethered shooting with live view is supported for some camera brands. Exports include disk storage, email attachments, Piwigo webalbums and HTML-based galleries; many aspects can also be scripted in Lua. Optional AI tools cover object masking, denoising and upscaling, but the Flatpak release does not include them as of September 2026. Downloads are available for Windows, macOS and Linux/Unix options. macOS bundles require version 13.5 or later. The project notes that the learning curve can be steep.

Nitro is a photo editor and manager for photographers on macOS and iOS. It works with Apple Photos and iCloud Photos, plus files in Finder, Files.app, and external storage. Editing includes 16 precision adjustments, AI subject and background masks, gradients, brushes, cloning, and spot removal. Supported RAW formats include Apple-supported formats, DNG, iPhone ProRAW, compressed Fujifilm, Nikon HE and HE*, GoPro RAW, and additional camera formats, using Apple’s RAW engine. Nitro reads and writes XMP sidecars and exports JPEG, TIFF, HEIF, and PNG. The macOS app adds ExifTool integration, metadata search, GPS maps, and comparison of up to 16 images with synchronized pan and zoom; iPad comparison supports up to four. A Photos editing extension can sync changes through iCloud Photos. A lifetime purchase costs $99.99 as a one-time purchase and includes macOS, iOS, and future updates; a seven-day trial is available.