There is a drawer in most houses with eight keys in it and nobody who can say what any of them open. Key Drawer fixes that.
Name a key, say what it opens, add a note about which copy it is, and photograph it so you can tell it apart from the three that look exactly the same. Search by name, note, or what it opens. The drawer sorts itself.
Everything stays on your iPhone. No account, no cloud, no analytics — the app makes no network requests at all.