I am looking for an Android app that can search inside meta-taged graphics files (primarily jpg, png) not only by flat tags (primarily IPTC and MWG), but also by hierarchical tags.
For Windows I am using FastPhotoTagger, which is more than enough for all basic operations https://fastphototagger.sourceforge.net/hierarchical.html
However for Android tablet the app ain't quite there yet, as far as the hierarchical search is concerned.
So I'd really appreciate any recommendations from someone who's in the know. Preference shall be given to freeware with no ads.
Thanks in advance.