Keep track of your solving status and scores across major Olympiads.
Support for 20+ contests including IOI, APIO, EGOI, BOI, USACO, and more.
Fully responsive design that works great on desktop, tablet, and mobile.
Beautiful dark mode that automatically saves your preference.
Make your checklist public and share a clean link to show your progress.
Delivers a smooth experience with secure autosave, powered by lightweight, pure HTML, CSS, and JavaScript.