There are a couple of apps in the Playstore which permit you to view/Edit EXIF data:
- Photo Image Editor - Photoshop
Photo Image Editor - Photoshop(free) says it can View, edit, or delete EXIF data - Same promised by Photo Editor
- Exif Editor and Viewer
Exif Editor and Viewer(paid) promises to remove, modify, and add individual or multiple EXIF tags - Pixelgarde
Pixelgardeeven states: Edit exif metadata for several photos as a batch, or just individual photos
There are probably many more, so I just picked two of the more promising examples. And as Play Store is known for losing apps, please consider the above examples for the fact such apps exist – and check with my list here for what is currently available.