To add funds, click on the ‘Add’ button on the balance page. You can then select the relevant account you want to transfer funds from and the amount you wish to transfer.

For NetBanking transfer select the NetBanking button on the app. 
This will costs you 7 for every transfer you make.
 After selecting this you will be taken to the bank NetBanking website where you will have to enter your credentials to pay.