Help to understand the cause of rejection

My android full app Photo Multiple Compressor was rejected with this message :
This item has a nice concept, but doesn’t feature the required functionality and features to be approved as a premium item. Consider expanding the feature set here.
Please help what i should edit in my app to be compliante ?

No one here has any idea what “Photo Multiple Compressor” is, so please include a demo link or something we all can take a look at.

1 Like

this is my demo app :