NGU METER A silly quiz for iPhone & iPad
Is your brain on vacation?
10 riddles, trick questions and brain twisters. About a minute. One very questionable result, plus a title to show off to the group chat.
- Free
- No ads
- Works offline
- English & Tiếng Việt
Try 5 questions now
No install needed. Read every word: each one has a trap.
Here are a few (turn on JavaScript to play for real).
Team A scored the first goal and the last goal of the match. Did Team A win?
Answer
Not necessarily. Not necessarily. A leads 1–0, B scores 3, then A scores again: A got the first and last goals but lost 2–3.
10 candles are burning. You blow out 3 of them. How many candles are still burning?
Answer
7. 7. The famous riddle asks what's left the next morning; this one asks about right now, so 10 − 3 = 7 still burn.
It's not true that Lan didn't eat the last spring roll. Who ate the last spring roll?
Answer
Lan. Lan. 'Not true that she didn't' cancels out to 'she did'.
If a week runs from Monday to Sunday, which day is right in the middle of it?
Answer
Thursday. 7 days, so the middle is day 4: Mon, Tue, Wed, then Thursday, then Fri, Sat, Sun.
On the Moon, an astronaut lets go of a sturdy helium balloon. It…
Answer
Falls to the ground. It falls. A balloon only rises by being lighter than the air around it, and the Moon has no air.
How it works
Three steps, one minute, endless group-chat arguments.
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Answer 10 questions
A gentle warm-up that ramps up. The last four are proper brain twisters 🔥🔥🔥.
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Get your chaos score
The more you miss, the more chaotic you are. Plus a title, from “Suspiciously Sane” to “Ultimate Chaos”.
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Dare your friends
A story-ready card with a QR code. Friends scan it to play your exact 10 questions, offline.
What's inside
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5,000+ questions
Riddles, trick questions, logic, everyday chaos and “wait, really?” trivia.
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Brain-twist meter
Every round: 2 easy, 4 medium, 4 hard, with 🔥 flames as a warning.
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“Why?” explanations
Every hard question explains itself in one line. Instant “ohh”.
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Daily quiz & streaks
Everyone gets the same 10 questions each day. Keep your 🔥 streak, with optional reminders.
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26 badges
Collect titles, milestones and a few secret badges.
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Home-screen widget
Your streak and today's quiz at a glance. Tap to play.
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Offline challenges
An 8-character code or QR. Paste a whole message and the app finds the code.
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Truly private
No account, no tracking. Everything stays on your device.
Wrong answers, right vibes
A pink brain mascot reacts to every answer. Hard questions explain themselves, and finished rounds unlock badges.
- The mascot reacts to every answer
- Every hard question explains itself
- Finished rounds unlock new badges
Who will you be?
0–14
15–34
35–54
55–74
75–94
95–100
Collect badges
Goldfish Mode
Talking Potato
One-Bar Wifi
Brain on Vacation
Hamster Wheel
First Brain Twister
3AM Owl
Suspicious Detective
FAQ
Is Ngu Meter free?
Completely free. No ads and no in-app purchases.
Is it an IQ test?
No. The chaos score is just for fun and doesn't measure anyone's intelligence or worth. The jokes are about the situations, never about you.
Do I need the internet?
No. Questions, the daily quiz and challenges all work offline. A challenge code carries everything needed to rebuild the exact round.
How do challenges work?
After a round, share the result image or the 8-character code. Friends scan the QR or tap “Got a challenge code?” and paste it to play your exact 10 questions.
Does the app collect data?
No. No account, no tracking, no server. History and achievements live only on your device.
Does it work on iPad?
Yes. It supports iPhone and iPad, in any orientation on iPad.
Ready to send your brain on vacation?
Ngu Meter is out now on the App Store, free. Or try 5 questions right here and see your chaos score.