Recover the API from a legacy Android APK

What the APK preserves

The package holds compiled code, resources, native libraries and configuration. Request builders reveal paths, payload fields and response handling. Runtime traces show the session setup and request order used by the installed build. Android APK Analyzer documents how to inspect package files, DEX and resources.

Check the backend before migration

An APK does not contain its remote server. Record which hosts still resolve, which requests succeed and which flows depend on retired services. Missing server data and removed endpoints require a backend migration plan; decompiling the app does not restore them.

Compare available versions to identify changed routes, certificate settings and payload formats. Keep the version and package hash with each finding. Trace login and token refresh before testing business calls so expired credentials do not look like a retired endpoint.

Hand off a complete integration

The delivery maps the full endpoint set, request formats, authentication, generated values and response models into the clients. Tests cover session renewal, error responses and request order. Documentation lists the build used for verification and the dependencies needed to run the package.

See a runnable Python signing example. It uses public test data and is not presented as a past client project.

Android Keystore keys can be non-exportable and bound to secure hardware. A server that requires proof from that hardware has a runtime dependency that copied code cannot remove. We check this during the APK review and state the deployment requirements before the quote. Android Keystore documentation.

The full APK is the project

You receive Python, JavaScript/TypeScript, Postman and API documentation for the full application. The work covers endpoints, authentication, request signatures, encryption, decryption, sessions and backend workflows.

Run the complete public demonstration to inspect one matching workflow in every format.

Send the APK on WhatsApp or email. The 24–72 hour delivery window starts after we receive the APK and any account access needed to run it. The fixed quote states the deadline. Most projects finish sooner.