//step1 //add this package to flutter >> razorpay_flutter: ^1.2.2
//step2 //add that payment file on your lib
//step3 //ctreate a page there is written like 3 month subscription for 100 //and a subscribe button //in that button add the below code
onTap()
{
var price = 100; Navigator.push( context, MaterialPageRoute( builder: (context) => CheckRazor( price: price, )));
}