Senpai is a simple website blocker that helps you study. It notices when you try to visit social media / youtube, etc and blocks the request - telling you to keep studying!
Now available on the Chrome Web Store: https://chrome.google.com/webstore/detail/senpai/pfkacaifoalmlflljbombdhcfheoelpc
Made with care at a Hackathon by Zhiwei Xu, Walter Lim, Krishnan Sharma and Kok Hong Leon Le