Is there a way to display text if Cydia is installed?

Question

I am making a mobile website and I want to know if there is a possible way to write text on the page if Cydia is installed? Preferably in Javascript. I'm guessing it would be a variable and an if/else statement.

Answer 1

You can test if the page is opened inside Cydia, but it not if Cydia is installed.

You can do this with matching the useragent string with Cydia.