7-Day No-Snooze Streak
Get up with your first alarm every morning for a week, no snooze button. Check in once a day.
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Daily facts and stats about alarms and alarm clocks, plus real challenges to put them to work.
What is the body's roughly 24-hour internal cycle of sleep and wakefulness called?
Circadian comes from Latin for 'about a day', describing the body's daily internal clock.

One ranked attempt per day. Practice as much as you like.
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Get up with your first alarm every morning for a week, no snooze button. Check in once a day.
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With an adult's help, press the test button on your home smoke alarm and note its test date. Post a short write-up.
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Set one wake-up time and stick to it every day for two weeks, weekends included. Check in once a day.
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Live counts from AlarmChallenge.com. All arena stats →
Earned on any arena, shown on your profile everywhere.
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Fund a prize on AlarmChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
Play today's quiz round, post your score, and start a streak.
XP, levels, streaks and badges. Save your progress with an email and it follows you to every arena on the iChallenge network.
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.