Calibrate is a free Chrome extension developed by Saraf Consulting. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

The main purpose of Calibrate is to hide numbers on web pages, providing users with an opportunity to guess them. This unique feature can be useful for individuals looking to improve their mental math skills or simply enjoy a challenge while browsing the internet. By hiding the numbers, Calibrate encourages users to engage their brains and try to deduce the hidden values based on context and other available information.

With Calibrate, users can customize the level of difficulty, choosing to hide numbers on specific types of web pages or across all websites. The extension seamlessly integrates into the Chrome browser, allowing for a smooth and uninterrupted browsing experience.

Overall, Calibrate is an intriguing Chrome extension that adds an element of fun and mental stimulation to web browsing. Whether you're looking to sharpen your math skills or simply enjoy a unique challenge, Calibrate provides a refreshing twist to the online experience.