You know that feeling when you open Codeforces on a Sunday evening and see "Round #987 ended 2 hours ago"? Yeah. That was me. Every. Single. Week.

I'd forget about contests. Miss Div. 2 rounds I was prepared for. Open LeetCode and see the weekly contest ended while I was sleeping. Check CodeChef only to realize Starters was yesterday.

So I built**ContestBell** — a free tool that watches Codeforces, LeetCode, CodeChef, AtCoder and HackerRank 24/7 and emails you before every contest.

Not one reminder. Three: - The moment a new contest is announced - 1 day before it starts - 1 hour before — so you actually warm up

You pick which platforms and divisions you care about. Only Div. 1 and Div. 2? Done. LeetCode weekly only? Done. All of them? Also done.

No app to install. No bot to add. Just your email.

→ https://contestbell.netlify.app

Takes 2 minutes to set up. Free forever.

I built this as a solo project and I'm actively improving it based on real user feedback. If something doesn't work for you, or you want a feature added — drop a comment below or reply on the site. I read everything and I'm genuinely trying to make this useful for the CP community.

Stop missing contests you were ready for.