I run a nonprofit group that maintains a similar but different database, ours focuses on identification of heritage varieties, I.e. apples that existed pre WWII. We're in the PNW so we also have catalogs of where they were sold to make their way to us, etc, as we identify trees in old orchards.
I've learned some interesting stuff along the way, like that English varieties keep showing up in eastern Washington because English nurseries shipped to Vancouver in the late 1800s.
But our mission is really heritage trees, which we loosely define as pre-WWII. We do work with landowners to get their trees DNA tested and identified if they're interested. But despite maintaining the encyclopedia I linked in the other comment, we're a small group of volunteers (~6 people) and are mainly focused on a specific geographic region.
I run a nonprofit group that maintains a similar but different database, ours focuses on identification of heritage varieties, I.e. apples that existed pre WWII. We're in the PNW so we also have catalogs of where they were sold to make their way to us, etc, as we identify trees in old orchards.
I've learned some interesting stuff along the way, like that English varieties keep showing up in eastern Washington because English nurseries shipped to Vancouver in the late 1800s.
Our apple database is here: https://heritageapplecorps.org/varieties/