Paytm is very usefull application and paytm website thay developed paytm app for android and ios device .paytm is very good app for online transaction money safely .and also they provide shopping site also but for shopping its not good as compare to other online shops like amazon, snapdeal.because many product are not available on paytm so its not good for shopping but its awesome for online transaction , transfer.its is easy to use for anyone .it is security is very high so we are safe on paytm from hackers .paytm wallent also provide service like online recharge they give coupon on and discount on buying product .so I suggest you to use paytm .because I m user of paytm