Phototonic vs gThumb
When comparing Phototonic vs gThumb, the Slant community recommends gThumb for most people. In the question“What are the best FOSS image viewers for UNIX-like systems?” gThumb is ranked 8th while Phototonic is ranked 15th. The most important reason people chose gThumb is:
I was looking for a app like this. It's almost perfect. Lightweight, simple but with great features, even some advanced features.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Clean and functional UI
Beside being pretty clean and easy-to-use, the UI is also pretty fast.
Pro Can be easily keyboard driven
Lots of pre-defined keyboard shortcuts.
Pro Highly customizable
Lots of options to personalize your experience. You can set Photonic to fit images by width and height, or width or height; rotate according to Exif orientation; show/hide image name in viewer; adjust space between thumbnails; adjust delay between slides.
Pro Lightweight and has great features
I was looking for a app like this. It's almost perfect.
Lightweight, simple but with great features, even some advanced features.
Pro Easy to use
Cons
Con No Dark mode
And not a lot of customization available.