Brilliant: Learn by Doing is an interactive learning platform aimed at enhancing problem-solving skills and knowledge across various subjects such as mathematics, science, and computer science. Through engaging, hands-on lessons, users can explore complex topics in an enjoyable and practical manner, making it suitable for learners of all ages.

Yes, Brilliant is designed to serve a broad age range and skill levels. Whether you're a student, a professional, or a lifelong learner, the platform offers courses and problems tailored to different levels, allowing users to learn at their own pace and deepen their understanding across multiple subjects.

Brilliant operates on a subscription basis providing unlimited access to all courses and problem sets. Users can select monthly or annual plans, with the annual plan offering a discount. A free version with limited content is also available for initial exploration before subscribing.

Brilliant primarily focuses on STEM (Science, Technology, Engineering, and Mathematics) subjects, including algebra, geometry, calculus, physics, computer science, and logic. The platform is regularly updated with new content to offer the latest educational resources.

Currently, Brilliant requires an internet connection to access its full suite of interactive courses and problem sets. Although some resources are downloadable, the platform's emphasis on interactivity means users need to be online to maximize learning and track their progress.