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flathub.org
In short: Getting listed on Flathub is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Submit a mature graphical Linux your app with verified metadata, screenshots, homepage and source links.
Submit a mature graphical Linux your app with verified metadata, screenshots, homepage and source links.
Strictly requires a functional Flatpak; current Flathub policy disallows generative-AI-assisted submission code, content and review comments.
Open the submission page on flathub.org and complete its form — that is the "Open submit page" link at the top of this page.
Strictly requires a functional Flatpak; current Flathub policy disallows generative-AI-assisted submission code, content and review comments.
Priority sets the band — this one is medium. Cost (free) and effort (moderate) move it within that band, which puts it in the useful tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.