Smart Water bottle - App developing

I'm developing a new smart water bottle and need to develop an App to synchronise information coming from the bottle through Bluetooth/WIFI and automatically update hydration information.

3 areas of focus to be developed:
- Hydration focus
- Nutrition focus
- Mental Health.

The app must have also some gamification to incentivise the usage of the bottle. The bottle carries some sensors that will update information on the App.

Technical requirements
- Android and iOS system compatibility. Web search for Refill Stations with Location information of the water fountains.
- Smart watch iOS and other systems compatibility.
- Location based.
- Cloud integration.
- Registered with social media as option.
- Integration of Built-in Features: calendar, push notifications, geolocation, weather, camera, Voice commands (like Siri or Alexa), messaging and chat.
- Integration to Health app, Garmin and fitbit.
- Accept payments from subscriptions.

Looking for a App developer and back end integration.

Candidates must show similar designs and applications.