Darktable is a free alternative to Lightroom, available on Linux, with powerful masking options and a solid toolkit for image editing. Its UI falls between Lightroom and Rawtherapee in complexity ...

In our experience, RawTherapee is one of the best free Lightroom alternatives you can find - so long as you're mostly focused on RAW image editing. It's an open-source RAW image-processing app ...

If you're seeking out better or different ways to edit photos on mobile than Lightroom, here are some options.