https://www.metaedit.app/
MetaEdit is a tool for tagging photos with custom metadata.
MetaEdit can also be used to tag photos with custom keywords to be searched by the Apple Photos app. This feature can be enabled in settings.
Privacy Policy: https://nqeng.com.au/metaedit-privacy-policy
Terms of Use: https://nqeng.com.au/metaedit-end-user-license-agreement