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IzzyOnDroid vs Fossdroid: catalog facts
IzzyOnDroid	Fossdroid
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Best for: Android users of F-Droid clients who want apps missing from the main repository	Best for: Finding open-source Android apps from a web browser
Free Free to add and use from any F-Droid client.	Free Free to use, and all listed apps are free and open source.
Android, Web	Web
Around 1,400 open-source apps, many missing from the main F-Droid repo Official developer builds with additional screening Daily update checks and index refreshes Web catalog with filters for license, category and anti-features	Only lists free and open-source apps Trending, popular and newly added lists Easy to browse from a desktop browser
Needs an F-Droid client such as F-Droid or Droid-ify to install apps Apps are developer builds, not built from source by the repository	Mirrors the F-Droid catalogue rather than adding its own apps No automatic update handling like a store client
Hosted service	Web application
Not open source	Not open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Sources for IzzyOnDroid apt.izzysoft.de/fdroid Catalog checked September 23, 2026	Official website Full listing and sources Sources for Fossdroid fossdroid.com Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

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