Tecno Buds Companion App for iOS & Android with Full Feature Suite

I want to develop a companion app for Tecno Buds on both iOS and Android. The app should include features such as custom EQ, HearID sound profiles, ANC controls, firmware updates, customizable touch/button controls, battery monitoring, gaming mode, Find My Device, sleep/relaxation sounds, multipoint connection management, LDAC/Hi-Res settings, fit test, and full device settings. I have technical documentation and API access, and need the freelancer to design the app UI/UX from scratch, support multiple languages, and handle end-to-end development and app store submission. Ideal skills: cross-platform mobile development (Flutter or React Native), UI/UX design, Bluetooth device integration, and experience with audio products or wireless earbuds. Strong communication and project management is also preferred.