KnowDown
Trivia with ELO Ratings
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Test your knowledge on a live leaderboard with real players. Your ELO rating shows where you truly stand — fair, competitive, dangerously addictive.
Welcome to KnowDown — the trivia game that truly measures your knowledge.
Answer more than 700 quiz questions across history, science, culture, sports, geography, technology and general knowledge. Every correct answer raises your ELO rating. Every miss teaches you something new.
WHAT MAKES KNOWDOWN SPECIAL
• ELO rating system: Your skill is measured like a chess grandmaster's. Beat harder questions, rise faster. Fair, competitive, transparent.
• Curated question base: 700+ carefully written trivia questions in 7 categories — history, science, culture, sports, geography, technology and general knowledge. Regularly expanded.
• Global leaderboards: Compete with players worldwide on a live Top 100 leaderboard. See in real time who's pushing for the top spot.
• Smart matchmaking: Questions adapt to your ELO. Beginners get easier ones, experts get challenged.
• Daily limit: 10 questions per day keep you coming back — no pressure, no burnout.
• Friend-code bonus: Invite friends with your 8-digit code. You get +1 question per day for 7 days per invite, your friends get +2 questions per day for 7 days.
• Day streaks & awards: Play every day and build your streak. Unlock achievements for streaks, perfect days and ELO milestones.
• Answer history: Review every question you got right or wrong — and learn from it.
• Dark & light theme: Easy on the eyes, day or night.
HOW IT WORKS
1. Create your account via magic link (e-mail)
2. Answer up to 10 questions per day
3. Earn ELO points for correct answers
4. Build your day streak and collect awards
5. Climb the global leaderboard
ACCESSIBILITY IN FOCUS
KnowDown was built with accessibility in mind — the developer is visually impaired and uses VoiceOver every day:
• Optimized for VoiceOver and TalkBack
• Improved contrast and larger touch targets
• Adjustable text sizes and reduced motion
• Important information is not conveyed by color alone
PRIVACY & SECURITY
• Passwordless login — no password to leak
• No third-party trackers, no ads, no data selling
• Hosted in Germany under German law
Questions? Feedback? Get in touch: support@knowdown.de
KnowDown — Think fast. Score higher. Rule the leaderboards.
Ratings & Reviews
HOTFIX: Onboarding button
The continue button on the name step is now fixed and visible instead of depending on the scroll/keyboard layout. This keeps onboarding reachable after invite-link entry and name input.
The developer, Niklas Debbrecht, 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:
- Contact Info
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Niklas Debbrecht
- Size
- 36.4 MB
- Category
- Trivia
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 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 and German
- Age Rating
4+
- 4+
- Copyright
- © 2026 Niklas Debbrecht
