In requiremnt gthering phase the developers and stakeholders discuss the requirement of a product, its features, its limitations and the time required for product deployment.
In Design phase the designer is supposed to do the design of the product in order to get the best user experience and best user interface.
Mobile App Implementation
In Mobile App Developemnt phase the developers team develop the product as per its finalized design and the user requirements with keeping time limitations in mind.
In Quality Assurance, the app is tested to gather app crahses,bugs and problems, if there arew any, which is to be fixed by the developer.
In Deployment phase the app is deployed with all its (APK , Bundle) Store graphics for the play store.
When stakeholders need some updates regarding to the app then developers are retasked for the updates.