How will the Chinese app bann affect both countries in whatsoever way ...please elaborate?

For the Chinese company it could be a bigger issue because there is a big market they are losing out. For example, Tik Tok and UC Browser were all extremely popular in India and the bank is surely going to impact their presence in a lucrative market.

For India, this may be more of an opportunity for indigenous app creators. Many of these domestic apps could never take off as India was flooded by more efficient apps. Now that is likely to give some breathing space and help the Indian app ecosystem.