Automatic Currency Converter for my Wordpress Easy Digital Download Website

I currently have a e-commerce Wordpress Easy Digital Download website where I sell t-shirts in GBP. I want to integrate an automatic currency switcher. This Currency Switcher for Easy Digital Downloads should automatically detect my visitors country and show currency they would like to see your prices, as well as complete transactions in such currency. I want to have all the major currencies currencies people from Europe should see Euro, people from UK should see GBP and people from american / canada etc should see USD . Also a default currency option for any other countries region. My customers currently pay via paypal. There is a plugin on the market that does all that but I don't want to use this plugin etc and want to integrate the whole thing on my website instead of relying on other plugins. [login to view URL] Reply with word Currency or I will not reply and also you should be able to help me integrate this on my current website as I am a C# developer and can put code my self instead of giving you access to the website. Reply with word Currency Thank you