Mobile App Duplication With Data

I need a developer who can reproduce a current mobile app in its entirety—interface, features, back-end configuration, user accounts, content, and settings—so the new build behaves exactly like the original.

Before we get our hands dirty, I’d like guidance on what data can legally be migrated. I dont own the app.

Requirement is to extracting every component, cloning the database (just 100 of pages of notes, few videos and pictures - which i dont own), recreating server rules, and compiling fresh iOS and Android builds that point to the duplicated infrastructure. Source code, deployment instructions, and a fully functional test build are the final deliverables.

Experience with mobile reverse engineering, database migration, and cloud back-end replication will be key. If you can provide a brief outline of how you would approach the audit and duplication, I’ll prioritise your proposal.