Yes—an experienced team can take over an existing Android app project from another developer, but it depends on whether you can provide full access to the code and release assets. The usual takeover process in professional android app development services starts with a quick audit (code quality, architecture, pending bugs, and what is already working), then setting up the project on a new build system, and finally moving into fixes and new features. To do this safely, you typically need the full source code repository (Git) and branch history, API documentation (backend endpoints, keys, and environments), the Android signing keystore and passwords (or a safe migration plan if the app is already on Store), access to Google Play Console, Firebase/Google Cloud, and any third-party dashboards like payment, SMS, maps, analytics, push notifications, etc.; without these, even the best android apps development service may be blocked from publishing updates.