Streak · 3 days+165 XP
3-Day Kickstart
Pick one small habit, like a 10-minute walk or reading 5 pages, and do it three days in a row. Check in each day.
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Challenge · Facts & stats · iChallenge network
The 3 Day Challenge
Daily facts and stats about three-day habit sprints and the science of days and habits, plus real challenges to put them to work.
Warm-up questionNot ranked · tap an answer
What is the body's roughly 24-hour internal clock called?
'Circadian' comes from the Latin circa diem, meaning 'about a day'.
Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #19Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Streak · 9 days+195 XP
Triple Sprint
Run three back-to-back 3-day sprints, choosing a new small habit for each block. Check in once a day.
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Proof+250 XP
Plan Your 3-Day Sprint
Write your goal, the cue you'll attach it to and three concrete daily steps, then post a short write-up.
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By the numbers
Live counts from 3DayChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days78
Challenge joins24
Leaderboard
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Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
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.
Put a prize on a challenge
Fund a prize on 3DayChallenge.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.
- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
Current sponsors
Questions
How are scores counted?
Every correct answer earns points, faster answers earn a speed bonus, and each challenge day you log adds XP.
Can teams play?
Yes — share your referral link and compare scores on the leaderboard.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
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.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.