Perfect app and great support team This is indeed great app and great people who support it. I think it is hard these smartphone days and distractions all over to focus and study, although it is so interesting stuff to learn. I wish I had the time and learning skills to use it properly. Last thing to note the subscription model, where you automatically paying w/o noticing should be changed. The company must try to find a way to inform customers before auto renewl period

Kind of a cool system Kind of a cool system. I did not stick with it cause life is too busy. When they charged me and I cancelled just after they were flexible about giving a refund. They only do that once so don't be sneaky!!

Disappearing classes Although the classes are interesting and the math is (sometimes) well explained, there are also a lot of issues with Brilliant: *Classes disappearing in the middle of doing it. Algebra 2 for example *Classes skimming through essential piece of information, e.g. Introduction to linear Algebra. I'd really recommend a mix of other solutions if you want to further your understanding of mathematics. Khan Academy & 3Brown1Blue (and many other free resources) provide better explanation and have the same level of interactivity.

A great app for learning A great app for learning. Sadly though, I didn't have time to use it and had to cancel my subscription only to realize that the said subscription already started. However, with their great support, they were able to help me sort it out with a refund. Nothing but great experience so far. I highly recommend it!!

Refund request Excellent response from Customer Service to my refund request which was processed in a quick and friendly way.