Hacker News Reader

Instead of "Trends for Websites", you can use "Google Ad Planner " https://www.google.com/adplanner which has more detailed traffic statistics.

nope, not anymore (as mentioned above) i.e.: https://www.google.com/adplanner/#siteSearch?uid=twitter.com... killed the product (for most websites on the web), too.

Nowadays you can only use it for websites that accept Google AdWords.