Can you explain me what exactly are these “One Time Payment” and “Renewal Charges” ?

One time payment covers the cost of server for one year and the cost of design and development (one-time cost). For e.g: Individual Plan is priced at Rs.90,000 /- and renewal charges are Rs.42,000 /- per year, that means Rs.42,000 is cost of the server subjected to renewal every year and Rs.48,000 /- is the one-time cost for design and development of your app.