help convert wordpress-commerce website to mobile app

My project is to convert an existing e-commerce website built in WordPress to an app for both Android and iOS platforms. I have a basic idea of what I would like the design to look like and have a timeline in mind for completing the project. The app should be customer-friendly, user-friendly and should provide a seamless customer experience. The app should be designed in such a way that it can be easily navigated and intuitive to use. It should also integrate with the existing website databases and processes to provide customers real time access to their data. Additionally, I am looking for a vendor who can optimize the app for all devices, making sure it runs quickly, is responsive and stable.