Best one I've tried – MetaGear - metadata editor Review

The ability to edit multiple photos at once with custom data is so great and easy to use. Three suggestions: -the app description mentions that its extension can be used to edit metadata from within the Photos app, however this only works for JPGs. Now that we're on iOS 11 it would be nice if this also supported HEIF -would love the ability to view / edit video metadata -it would be convenient to be able to swipe between photos in the app
Review by Cambienta on MetaGear - metadata editor.