feh vs Phototonic
When comparing feh vs Phototonic, the Slant community recommends feh for most people. In the question“What are the best FOSS image viewers for UNIX-like systems?” feh is ranked 3rd while Phototonic is ranked 15th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Loads up images extremely fast
Pro Minimalistic
Goes well with tiling window managers.
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.
Cons
Con Junky rescaling by default in WMs
Fixable by running these commands:
echo "alias feh='feh --scale-down --image-bg black & disown" >> ~/.bashrc
source ~/.bash_profile
But after entering those two commands for all users, feh works flawlessly, and is extremely responsive. Would definitely recommend.
Con No Dark mode
And not a lot of customization available.