Ive used curious.com, as well as the app, for awhile now. The app is just as well-designed as the website, in terms of esthetics and usability. With a myriad of topics, ranging from academic to DYI, there is something for everyone. I appreciate that not just anyone can post videos/lessons, and that there is quality control in terms of content. Its a pleasure to utilize the app to gain knowledge about a specific topic, or just surf a bit to learn something new and fun.
Haogro about Curious - the game of learning