Heuristic Review 101
Evaluate any app against the 10 usability heuristics
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Tech · Facts & stats · iChallenge network
Daily facts and stats about user experience design, plus real challenges to put them to work.
What does Fitts's law predict?
Fitts's law says larger and closer targets are faster to point at, which is why key buttons are made big.

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.
Evaluate any app against the 10 usability heuristics
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Sketch a simple paper wireframe for an app screen you use often, improved your way, and post a photo link or short write-up.
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Each day, notice one confusing button, sign or form in daily life and note how you would fix it. Check in once a day.
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Ask five friends to complete one task on a website or app while you watch quietly. Post a short write-up of what tripped them up.
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Live counts from UXChallenge.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 UXChallenge.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.
No. Rounds cover usability, accessibility, type and color basics, and challenges scale from reviews to redesigns.
Post your work as proof. Approved entries finish the challenge; community votes surface the best ones.
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.