Productivity Mobile App Development -- 2

I require a proficient developer who can create a productivity-based mobile app compatible with both Android and IOS platforms. The key functionalities needed in the app include:

1. App home page
2. User authorization and authentication (email base/mobile OTP based)
3. Image upload, store, retrieve, search by tags
4. Share images in public or to closed network groups (invite friends)
5. Users able to create moodboards using images
6. User statistics
7. Users are able to book appointments for a select service and able to view in their calendar
8. Personalized user inbox for push notifications and messages
9. Payment gateway integration

Ideally, I am seeking someone with previous experience in developing productivity apps and an understanding of task management and file sharing principles. The project should be completed within a month. Strong Android and IOS development skills are a must.