Evaluatr is a browser extension for Chrome that adds a five-star rating button to your Tumblr Dashboard. Developed by Evaluatr, this free extension allows users to rate any Tumblr posts from one to five stars. The rated posts are then displayed on charts on the Evaluatr website.

With Evaluatr, you can easily express your opinion on Tumblr posts by simply clicking on the rating button. Whether it's a funny meme, a beautiful photograph, or an insightful quote, you can now give it a rating and contribute to the Evaluatr community.

The extension seamlessly integrates with your Tumblr Dashboard, placing the rating button on all posts. It also works on post permalink pages on Tumblelogs and Tumblr posts embedded on other sites. This makes it convenient to rate posts no matter where you encounter them.

With Evaluatr, you can discover popular and highly-rated Tumblr posts, as they are showcased on the Evaluatr website's charts. This feature allows you to explore and engage with the most interesting and engaging content on Tumblr.

Overall, Evaluatr is a useful browser extension that enhances your Tumblr experience by adding a rating system. With its easy-to-use interface and integration with the Tumblr platform, you can easily rate and discover the best content on Tumblr.