Workflow to allow MyTag tagging outside of Rekordbox

Hi everyone... MyTag for me is the  entire i use Rekordbox over other music management softwares. I have a collection of over 6000 tracks and am far from getting my tagging to a state im happy with.

I long for an app or workflow that will allow me to manage my tracks (they are in the cloud) on the fly while im at the gym for example. An ideal tagging system would be one that looks something like the one in this post >>> https://community.enginedj.com/t/music-tagging/26766 where i can select from a predefined number of tags to append directly to the Rekordbox database.

I realise that MyTag does not exist in the meta data of the files themselves (like ID3 tagging in MP3s) and hence im struggling to find a reliable solution. If i were to tag all my music only when in front of my laptop, ill likely be dead by the time i finish.

Most of my tracks are AIFF which allow some meta tagging and i use FOOBAR2000 to append tags directly to the tracks themselves for fear one day AlphaTheta will decide to charge its customers to use rekordbox as a management tool. But i would really like to update my RB database too. I have an XDJ-RX3, if that is of any help?

Thanks in advanced.