Hi
I think the reference app that you gave it is very complex as well as it will be costly also. So I think you can shortlist the feature list as per initial phase and can implement more feature list as per income and return.
Please come to chat we will have detail discussion over it .
We are leading IT company in India having 7+ years of experience and mastery in App and Web development, App and Web designing, backend, SEO/SMM cloud services, and enterprise solutions.
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Please come to chat for further discussion so that we can start immediately.
Best Regards
Logical SoftTech