Frebase starter demo application with below features
👉🏼 Register/Login with Google account, Mobile OTP and normal email
👉🏼 Save user information in firestore
👉🏼 Upload profile picture, crop picture functionality and store in firestore
👉🏼 Theme customization
👉🏼 See other users available in the application
👉🏼 User privacy ⁃ If user don't want to show their personal data such as email and mobile number, they can choose this from privacy setting
👉🏼 Push notification and in-app messaging with firebase

This code is opensource and you can take a look at here - https://github.com/JAYTARPARA/Firebase-Demo-App

Please show some love by starring the repo if you like my work.

Here is the video preview of the application - https://youtu.be/2wl6YnGpr28