Dear Client,
As per your project requirements, you want to develop an mobile application for android and ios.
I have some experienced developers who has deep knowledge about mobile app development. Flutter /Async Redux / Firebase are all familiar for me .Native Android, Flutter, React Native, for Hybrid and Objective C, Swift, Java for Native are all my graduated programming language.
Please share in bit detail about your requirement what features you needed on the app and description for each screen. That will be quite helpful for us to come up with better ideas & suggestions further.
Regards