About LearnClash: A Competitive Learning App, Built for People Who Want to Remember
Most quiz apps test what you already know. LearnClash makes you learn what you didn't.
LearnClash is a competitive learning app combining ELO-ranked 1v1 quiz duels with built-in 3-stage spaced repetition. Built and operated solo by David Moosmann at Pluxia GmbH in Baar, Switzerland. Free on iOS and Android since September 2025. No ads in any tier.
This page covers what LearnClash is, who built it, the company behind it, how we make money, how we differ from the obvious alternatives, and where to download brand assets. Or jump straight to a 3-minute duel.
What is LearnClash
LearnClash is a competitive learning app where you play 1v1 quiz duels on any topic and retain what you learn through built-in spaced repetition. Each duel is 18 questions across 6 topics, played asynchronously over a 48-hour turn window. Available free on iOS and Android in English, German, French, and Spanish.
| Feature | LearnClash treatment |
|---|---|
| Topic engine | AI generates questions on any topic on demand. No fixed category list. |
| Matchmaking | ELO-ranked 1v1, 8 tiers from Iron to Phoenix, balanced inside ±80 ELO ~94% of the time. |
| Retention | 3-stage Mems spaced repetition built into every game mode (wrong → 7d → 90d → out). |
| Mode | Asynchronous turn-based, 48-hour turn window. Never real-time. |
| Monetization | Premium subscriptions only. No ads in any tier, ever. |
Who built LearnClash
LearnClash is built and operated solo by David Moosmann, founder and sole developer at Pluxia GmbH. The product began as a response to 12 years of daily QuizDuel rounds with his mother that tested knowledge but never built it. The full founder bio lives at /about/david-moosmann.
The company behind the app: Pluxia GmbH
Pluxia GmbH is the Swiss limited liability company that owns and operates LearnClash. Founded December 1, 2023 in the Canton of Zug. Registered office at Blegistrasse 7, 6340 Baar. UID: CHE-198.527.946 (verifiable on the Swiss Commercial Register). Sole director: David Moosmann.
| Field | Value |
|---|---|
| Legal name | Pluxia GmbH |
| Founded | December 1, 2023 |
| Headquartered | Baar, Zug, Switzerland |
| Director | David Moosmann |
| Address | Blegistrasse 7, 6340 Baar |
| UID | CHE-198.527.946 |
| Product email | support@learnclash.com |
| Press email | press@learnclash.com |
Full legal filings: Impressum.
How LearnClash makes money
LearnClash has no ads in any tier. The free tier includes unlimited duels, every topic, and full ELO ranking. Premium subscriptions are the only revenue source: $7.99 per month or $59.99 per year, with a 7-day free trial on the annual plan for new iOS and Android subscribers.
| Tier | Price | Includes |
|---|---|---|
| Free | $0 | Unlimited duels, all topics, ELO ranking, no ads |
| Premium monthly | $7.99 / month | Everything free, plus advanced statistics and exclusive rewards |
| Premium annual | $59.99 / year (7-day free trial) | Everything monthly, best per-month value, free trial for new subscribers |
Full plan comparison: /pricing.
How LearnClash is different (from Quizlet, Anki, Kahoot, QuizDuel, Trivia Crack)
LearnClash is the only major learning app that combines ELO-ranked 1v1 duels with built-in spaced repetition in every mode. Quizlet's free tier dropped SRS in 2024. Anki has SRS but no multiplayer or game design. Kahoot is classroom-first with no persistent ELO. QuizDuel has 1v1 duels but no retention layer.
| App | ELO 1v1 duels | SRS in every mode | Any topic | Our take |
|---|---|---|---|---|
| LearnClash | Yes, 8 tiers | Yes, 3-stage Mems | Yes, AI on demand | The only one combining all three |
| Quizlet | No | Free tier dropped SRS in 2024 | User-created sets | Best for flashcard creators, weak retention |
| Anki | No | Yes, FSRS / SM-2 | User-created decks | Strongest SRS, hardest to start, no game |
| Kahoot | No persistent ELO | No | Teacher-created | Built for classrooms, not solo learners |
| QuizDuel | Yes, 1v1 | No | Fixed categories | Closest mechanic, no retention layer |
| Trivia Crack | Limited | No | Six fixed categories | Casual fun, not built to teach |
Deep dives: vs Kahoot, vs QuizDuel, vs Trivia Crack.
Press kit and brand assets
Journalists, podcasters, and partners can use these LearnClash brand assets and contacts directly. For interviews or written quotes about LearnClash or Pluxia GmbH, email press@learnclash.com; David usually replies within 48 hours. For product or support questions, use support@learnclash.com instead.
- Logo (PNG, 1024×1024)
- Logo (SVG, vector)
- Founder portrait (JPG, high-res)
- Founder portrait (WebP, web)
- App screenshots (English)
- Brand colors
Brand colors
One-paragraph fact sheet (copy-paste friendly)
Quick fact sheet: LearnClash is a competitive learning app from Pluxia GmbH (Baar, Switzerland). Founder and sole developer: David Moosmann. Live since September 2025 on iOS and Android. Free with Premium ($7.99/mo, $59.99/yr, 7-day trial). 8 ELO tiers (Iron → Phoenix), 3-stage Mems spaced repetition, AI question generation across any topic. ~25,000 AI-generated questions across thousands of topics as of April 2026. 60 blog articles in English with full German, French, and Spanish translations. Wikidata: app Q138771266, founder Q138771338.
Frequently asked questions
What is LearnClash?
LearnClash is a competitive learning app where you play 1v1 quiz duels on any topic and retain what you learn through built-in 3-stage spaced repetition. Built by Pluxia GmbH (Baar, Switzerland) since September 2025. Free on iOS and Android with no ads in any tier.
Who owns LearnClash?
LearnClash is owned and operated by Pluxia GmbH, a Swiss limited liability company founded December 1, 2023 by David Moosmann. The company is registered in the Canton of Zug at Blegistrasse 7, 6340 Baar. UID CHE-198.527.946.
Where is LearnClash based?
LearnClash is built and operated by Pluxia GmbH from Blegistrasse 7, 6340 Baar, Zug, Switzerland. The app is shipped globally, with full localization in English, German, French, and Spanish.
Is LearnClash a real company?
Yes. Pluxia GmbH is registered in the Canton of Zug, Switzerland, with full company filings publicly available under UID CHE-198.527.946. Founded December 1, 2023 by sole director David Moosmann.
How does LearnClash make money?
Premium subscriptions only. LearnClash is ad-free in every tier. Premium is $7.99 per month or $59.99 per year, with a 7-day free trial on the annual plan for new iOS and Android subscribers. No advertising, no data resale, no third-party trackers in the app.
How is LearnClash different from Quizlet or Kahoot?
LearnClash is the only major learning app combining ELO-ranked 1v1 quiz duels with built-in spaced repetition in every mode. Quizlet's free tier dropped spaced repetition in 2024. Kahoot is classroom-first with no persistent ELO across sessions. Anki has SRS but no multiplayer or game design.
Pick a topic. Your first round takes 3 minutes.
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