This is the cheapest and popular option that being used by maximum people. If you are not in hurry, it will be suitable for you. This application will take one to three business days to properly process your application. For this process, you have to pay 65 USD.
This method is viable for the people who have no time to wait. It will take almost halftime compared to the previous method. You'll get your visa in your given Email address within three to five business hours. The fee will be 115 USD.