I purchased the full access on my iPad and I wanted to use it on my iMac but it keeps me in editing mode instead. It syncs all my notes perfectly but I can’t make a single change on it. I keep clicking “restore purchase” but nothing happens.
Given that iOS and macOS are of two separate operating platforms, iOS and macOS apps are sold separately. The purchase of the macOS app (be it license version or the one from the Mac AppStore) can't be used on the iOS AppStore, and vice versa.