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First Fossify app released on F-droid: Gallery
(f-droid.org)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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The way I understood it, the original changed ownership to some shady types. This triggered some concern that has led to the fossify forked versions.
As far as I know there haven't been any releases of the original since the ownership change, so this is a bit preemptive. I prefer that to finding out too late, though.