Knowster: World Quiz Duel
Represent your country live
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Which country is the smartest in the world? Find out — and represent yours.
Knowster is the worldwide quiz duel: you play in English, your opponent in Japanese, Spanish or German — the same question, at the same moment, live. Answer faster and you win on the spot. No waiting days for your opponent's move.
PLAY FOR YOUR COUNTRY
Pick your nation once — from then on, every win automatically counts for your country. 200+ nations battle for the quiz crown in the Nations leaderboard. A new season starts every 3 months, and the champion is honored for everyone to see.
YOUR LANGUAGE, YOUR HOME ADVANTAGE
18,000+ questions fully available in 10 languages: English, German, French, Spanish, Portuguese, Arabic, Turkish, Italian, Japanese, Russian. General knowledge, science, history, geography, music, movies, gaming, sports, anime and more.
CHALLENGE FRIENDS & FAMILY
Add your friends and challenge them to a live duel — settle once and for all who is the smartest at the table.
CLAN WARS 5v5
Create a clan with friends or join one. Challenge other clans: everyone starts simultaneously — real team battles in real time.
ELO LEADERBOARD & TOURNAMENTS
Climb from rookie to quiz legend. Fair matches through ELO matchmaking, leaderboards for players, clans and nations.
DAILY CHALLENGES
Daily challenges, streaks and rewards — a reason to come back every day.
FREE TO PLAY
Knowster is free. Optionally buy Coins to unlock legendary characters — but you can only win with your brain.
Download Knowster now and show the world what your country can do!
Ratings & Reviews
Fresh new look: a new green design, clearer answer feedback (green now only means correct) and layout fixes.
The developer, Mahdi Aouas, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mahdi Aouas
- Size
- 57.7 MB
- Category
- Trivia
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 10000 Coins $9.99
- 4000 Coins $4.99
- Premium 1 Year $39.99
- Premium 3 Months $11.99
- 1500 Coins $2.49
- 500 Coins $0.99
- Premium 1 Month $4.99
- Copyright
- © 2026 Mahdi Aouas. All rights reserved.