Detecting a wordpress theme has been made easy by sites like WPTD (Wordpress Theme Detector) and others but they are not always reliable as sometimes, they are unable to detect the Wordpress theme running on a blog. Today, I'm gonna teach you a very simply trick you can use to know the exact wordpress theme on a site using source code viewer using your mobile phone or pc. Goto any online source code viewing site (you can use DevShed seo tools) then type the url of the site you want to know what wordpress theme it uses and click on submit after which you will see the source code of the blog in a text box so just scroll down you will see the stylesheet code like this:

<link rel='stylesheet' id='delipress-font-awesome-css' href='http://www.blogurl.com/wp-content/themes/WORDPRESSTHEME/fonts/font-awesome/css/font-awesome.min.css?ver=2.5.1' type='text/css' media='all' />

And... Bingo! You've gotten the name of the theme running on that site..

Source: http://www.informlogy.xyz/2015/12/how-to-detect-any-wordpress-theme-using-source-code-viewer

dis is in no way a smart attempt, I can just change my theme folder name and get u deceived. Just navigate to whatwpthemeisthat.com and forget the rest

fattbabakay:
dis is in no way a smart attempt, I can just change my theme folder name and get u deceived. Just navigate to whatwpthemeisthat.com and forget the rest

You said it all....