Interesting. Mind sharing what is this app btw?
Sure.
It's called Nexus Media Importer.
Works with almost all USB cards with a OTG cable. No rooting required.
You can try the free Nexus Photo Viewer first to see if your OTG and USB works before buying. I did that and it worked so I paid for the full app as it allows all media, not just photo.
Both are made by the same person.
