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Press kit
LearnClash is the quiz duel that makes you smarter: 1v1 quiz duels against real opponents on any topic, every answer explained, and missed questions that come back.
From version 1.9.0, LearnClash plays on two pages on the open iPhone Duo and on iPad in landscape: the question on one, the answers on the other, and Clash's explanation beside the answer.
The question on one page, the four answers on the other: Argentina was the first country to use what for criminal identification?
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A right answer, Jorge Luis Borges, with Clash’s explanation on the second page.
Download| What it is | The quiz duel that makes you smarter: 1v1 quiz duels on general knowledge or any topic, an explanation after every answer, and missed questions that come back later. |
|---|---|
| Developer and publisher | Pluxia GmbH, Baar, Canton of Zug, Switzerland |
| Founder | David Moosmann |
| Launch | 1 March 2026, version 1.0 on iOS and Android |
| Current version | 1.8.3, released 19 September 2026 |
| Platforms | iPhone (App Store) and Android (Google Play) |
| Languages | The app plays in English, German, French and Spanish. Players with different languages can duel each other; each sees the questions in their own language. |
| Price | Free to play, with no ads in any tier. Premium: US$7.99 a month or US$59.99 a year, with a 7-day free trial on the annual plan. Local prices vary. |
| Age | 13 and up |
| Store category | App Store: Education, with Games > Trivia as the second category. Google Play: Education. |
| Recognition | Shortlisted for Best of Swiss Apps 2026 (jury shortlist of 1 October 2026, 41 of 143 entries; awards on 11 November 2026). Nominated for the TOMMI Games Award 2026, education category. Entry supported by the Swico Startup-Förderprogramm. |
| Website | learnclash.com |
| Format | 18 questions: 6 rounds of 3, with 45 seconds per question. One turn is 6 questions, about 3 minutes. |
|---|---|
| Turns | Turn-based, with 72 hours per turn and 3 turns per player. Players can also play live when both choose to. |
| Topics | Each round has its own topic, picked from a dealt hand of topics. General knowledge, history, science, nature, geography and hundreds more. |
| Explanations | Every answered question comes with an explanation from Clash, the app's mascot and tutor. Follow-up questions are limited on the free tier. |
| Solo | Sessions of 6 questions, including a daily review of questions that are due again. |
| AI rivals | Six named AI rivals for playing right away, labelled as AI and never rated. |
| Missed questions | Every question a player sees enters a 3-stage review cycle: Learning, Known, Mastered. A missed question becomes due again after 7 days; after a correct answer it waits 90 days. A wrong answer drops one stage, never the whole chain. |
|---|---|
| Rating | Human duels are rated on an ELO scale. Everyone starts at 1300 (Gold II), and the first 10 or so duels find a player's level. At a settled rating, a duel moves about 8 to 41 points, depending on the final score margin. |
| Ladder | 8 tiers and 22 ranks, from Iron (100 to 599) to Phoenix (2400 and up). |
| Question catalog | 49,194 live questions across 848 topics (production census, 21 August 2026; deprecated and rejected questions excluded). |
|---|---|
| Trivia Difficulty Index | June 2026 edition: 80,553 real duel answers, 156 ranked topics, 43.5% of answers wrong. The 21 July 2026 re-run: 116,783 answers, 187 ranked topics, 43.7% wrong. The 6 October 2026 re-run: 409,047 answers, 516 ranked topics, 33.6% wrong. |
| Hardest topics | In the June 2026 index: Culture (61.5% wrong), Law (61.1%) and Art (59.9%). The easiest ranked topic was German Proverbs (6.3%). |
| Misconception Index | July 2026 export: 267 publishable questions where players keep choosing one specific wrong answer. The headline row: 56.2% said the early samurai's main weapon was a curved longsword; 21.9% picked the right answer, the bow. |
| Company | Pluxia GmbH, Blegistrasse 7, 6340 Baar, Switzerland |
|---|---|
| Founded | 1 December 2023, Canton of Zug |
| Register | UID CHE-198.527.946 |
| Wikidata | App Q138771266, founder Q138771338, company Q140154726 |
Three lengths, ready to paste.
LearnClash is the quiz duel that makes you smarter: 1v1 quiz duels against real opponents on any topic, every answer explained, and missed questions that come back.
LearnClash is the quiz duel that makes you smarter. Players take on a real opponent in 1v1 quiz duels on general knowledge or any topic, get every answer explained, and see the questions they missed come back later. LearnClash is free on iPhone and Android, has no ads and plays in four languages.
LearnClash is the quiz duel that makes you smarter. Players aged 13 and up take on a real opponent in 1v1 quiz duels on general knowledge or any topic they choose, one turn at a time with 72 hours per turn, or play one of six AI rivals when they want a game right away. Every answer comes with an explanation, and every question a player sees enters a review cycle, so a missed question comes back about a week later. Human duels are rated on an ELO scale across 8 tiers, from Iron to Phoenix. LearnClash is free on iPhone and Android and plays in English, German, French and Spanish, with no ads in any tier; Premium subscriptions are its only revenue. It is built by Pluxia GmbH in Baar, Switzerland, founded by David Moosmann, and has been live since 1 March 2026.
Real captures from LearnClash 1.8.3 development builds on an iPhone 18 Pro Max simulator (1320 × 2868 pixels) and a Pixel 8 (1080 × 2400 pixels), taken on 25 September 2026 with fictional players, Mara and Theo. Nothing in the app was edited. On Android, the capture phone's own notification icons were removed from the status bar. PNG, lossless.
12 screenshots
A duel question against a real opponent: what does the name Argentina mean in Latin?
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A wrong answer, explained: why the mud mosque of Djenné is replastered every year.
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Winning a close duel, 16 to 14.
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The finished duel: six topics, every answer from both players.
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How often must the mud mosque of Djenné in Mali be replastered?
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The reveal shows both picks: the opponent chose Land of Gold, the answer is Land of Silver.
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A question the player missed comes back later in Solo, marked Review.
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Answered right on its return: the question is back on track.
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Your turn in round 3 of 6, one turn at a time with 72 hours per turn.
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After the duel, a Practice button on the round the player missed.
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Ratings move both ways: a close loss costs 19 points, from Gold III to Silver I.
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Solo: six-question sessions and a ladder of AI rivals, labelled as AI.
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German: why does the British monarch celebrate two birthdays a year?
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German: the reveal with the opponent's pick and how players answered.
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German: why Parliament had Charles I executed in 1649, explained after a wrong answer.
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German: picking the next round's topic from a fairly dealt hand.
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German: which explorer gave America its name?
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German: Amerigo Vespucci, and the opponent got it too.
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German: a duel in round 5, with topic names in the player's language.
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French: why is the base of a cumulus cloud usually flat?
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French: why a thick cumulus has a dark grey base, explained after a wrong answer.
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French: why does the British monarch celebrate two birthdays a year?
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French: the answer, for better parade weather, with how players answered.
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French: the duel so far, one topic per round.
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Spanish: how long does sunlight take to reach Earth?
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Spanish: your turn in round 3, the opponent's answers hidden until you play.
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Spanish: what colour is the base of a dense cumulus cloud?
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Spanish: dark grey is right; the opponent picked pure white.
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Spanish: a 14 to 11 win, plus 56 points and a new rank, Gold III.
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Spanish: the finished duel, with a rematch one tap away.
DownloadScreen recordings of real play, with no music, voice-over or on-screen text, to cut into your own video. MP4 (H.264), portrait, 1080 pixels wide, 30 frames per second, no audio.
Composed from the real screenshots on this page and the official Clash artwork. The clean version leaves the left side free for your own headline.
Transparent PNG files, large enough for print.
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David Moosmann founded LearnClash and builds it himself: product design, the mobile app, the backend and the blog. He is the director of Pluxia GmbH in Baar, Switzerland, and shipped LearnClash 1.0 on 1 March 2026.
David Moosmann is the founder and sole developer of LearnClash and the director of Pluxia GmbH in Baar, Switzerland. Born in Tübingen, Germany, he builds the app end to end: product design, the Flutter mobile app, the backend, marketing and every article on the LearnClash blog. The idea came from home. Around 2012 he and his mother got hooked on a quiz duel app and played it daily for 12 years, about 18,000 rounds. By 2024 they still missed the same questions: the duels were fun, but they taught nothing. LearnClash keeps the 1v1 duel and adds what was missing: an explanation after every answer and missed questions that come back. It launched on 1 March 2026.
Interviews in German and English, by video call or in writing. Time zone: Central European Time.
Two datasets from LearnClash's production database, under CC BY 4.0. Both hold aggregates only, never records about individual players.
Per-topic wrong rates from real duel answers. The June 2026 edition covers 80,553 answers and 156 ranked topics; the 21 July 2026 re-run covers 116,783 answers and 187 topics; the 6 October 2026 re-run covers 409,047 answers and 516 topics. The canonical page shows the latest run. Refreshed quarterly.
Cite as: LearnClash Trivia Difficulty Index, Pluxia GmbH (learnclash.com), with the edition's date.
Which wrong answer people choose, and how often. The July 2026 export on Kaggle scans 39,113 questions and lists 267 publishable rows; the canonical page shows a curated, source-checked selection from September 2026.
Cite as: LearnClash Misconception Index, Pluxia GmbH (learnclash.com), with the edition's date.
TOMMI 2026: Die Nominierungen für den TOMMI Games Award im Überblick
DEIN SPIEGEL, the TOMMI's media partner, presents every TOMMI Games Award 2026 nominee with the jury's assessment. LearnClash (Pluxia GmbH) is listed in the education category. In German.
LearnClash is nominated for the TOMMI Games Award 2026 in Germany, in the education category. The winners are announced from 30 November, the ceremony is on 6 December 2026. In German.
Das ist die Shortlist von Best of Swiss Apps 2026
Netzwoche reports on the Best of Swiss Apps 2026 jury shortlist: 41 of 143 entries. LearnClash (Pluxia) is in the article's list of shortlisted projects. In German.
An editorial mention of LearnClash's quiz duels and review features in the app-discovery section. Not a product review. In French.
Journalists and reviewers can get Premium for testing. Ask at the press address below.
Streamers and video creators may show LearnClash gameplay and monetize those videos. No permission needed.
Use these files to write about, review, stream or make videos about LearnClash, including monetized videos. Please credit "LearnClash" where your format allows. Crop and resize the screenshots as you need, but do not edit them to show features or content the app does not have, and do not alter the logos or Clash. Use the founder photo only in coverage of LearnClash or Pluxia GmbH. App store badges follow Apple's and Google's guidelines.
"LearnClash" for the app, "Pluxia GmbH" for the company, and "David Moosmann, founder of LearnClash" for quotes.
Write to press@learnclash.com. Replies usually within 48 hours.
Pluxia GmbH, Blegistrasse 7, 6340 Baar, Switzerland
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