Can I monetize my shiny app (It is an app to request a transportation service)?

I am working on a shiny app that will help the people to request transportation to travel from one site to another. I will charge the money for the transportation service so the app will just help me to collect the customers.

My question are:
Am I obligated to share the shiny app code?
Can I use the app to collect customers and then charge money to those customers?

Thank you