Setting up pricing tier for free app

Question

I have developed an app which is submitted to app store already and also approved. But I have following questions in my mind.

1. Currently my app is free. But my client wants to make it paid after 2 months. I did not set pricing information because not yet confirmed which tier want to select. So my question is if I set pricing information after some days of my app approval, does app will go for review again? Changing pricing information needs approval?

2. Suppose one of the user downloaded app on his device when app is
   free. Client changed pricing details and now app is not free. Now my question is how that user will do payment procedure. Does apple
   handle this scenario?

Answer 1

1. Currently my app is free. But my client wants to make it paid after 2 months. I did not set pricing information because not yet confirmed which tier want to select. So my question is if I set pricing information after some days of my app approval, does app will go for review again? Changing pricing information needs approval ?.

   NO. Unless you make some changes in your app and you want to upload a new version or something. Just a price change doesn't required a reapproval

2. Suppose one of the user downloaded app on his device when app is free. Client changed pricing details and now app is not free. Now my question is how that user will do payment procedure. Does apple handle this scenario ?.

   No apple won't handle this scenario. They'll continue to use it as free. Apple says App you once buy/download is yours. And all the updates which comes later are free.