How long it will take to create a app like facebook ??? And which coding language I should choose

Question

I mean a app that enables us to share text,images,videos etc., to others...
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Answer 1

Apps like facebook will take a lot of time to be created for a single person but if you make a team and distribute your work among each other then it will little less time.
If you want to make your app to run on others phone then to create such app it will take more than 6 months.