Isshub wasn't originally conceived in the spirit of "mobile first."
But we did a pass on all screens to make it completely usable on mobile.
Here are some screenshots on mobile:
The main dashboard:
A repository dashboard:
The list of issues:
With its filters:
And with an issue selected:
Get rid of the issues list by using the full width for the issue:
The "changed files" tab:
And you can use all the screen by asking the browser to get in full screen mode (it's also available in desktop to remove any disturbances):