Modificación a app existente y recompilar

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Nececito modificar una app android nativa y flutter a la que tengo una pantalla que añadirle (ya esta diseñada)es decir recompilarla con esa modificación comentada https://xd.adobe.com/view/7066385e-43e9-4d57-ae6e-54a38e96daff-2535/ https://drive.google.com/drive/folders/1bQGQHIu2ZX0GyXWC1iVrcIIHmLijItBM?usp=share_link https://github.com/F3nixsec/twinbusiness-api https://github.com/F3nixsec/twinbusiness-ios https://github.com/F3nixsec/twinbusiness-android.gitCategory: IT & ProgrammingSubcategory: Apps programming. Android, iOS and othersWhat is the scope of the project?: Small change or bugIs this a project or a position?: ProjectI currently have: I have specificationsRequired availability: As neededRequired platforms: Android, iPhoneI need to: Modify an existing appApp type: e-ShopBack-end is required: NoPayment gateway: No

Keyword: Kotlin

Price: $500.0

Secondary Price: $1000.0

Android iOS iPhone Responsive Web Design Flutter Kotlin