Android & IOS Chat app using APIs of an existing Web Application

Hi,
We need to develop android & ios app for an existing web based chat application. We can provide you the required APIs.

Features Required :
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- Android & IOS app with Apple Watch Support
- Push Message Support
- Open Corresponding chat window on push notification click
- Notifications to Apple Watch
- Reply from Apple watch using text & voice

You can use native coding or cross platform tools like react-native or any other tools for the development