LearnClash vs QuizDuel: Ad-Free ELO Duels [July 2026]

LearnClash is a competitive learning app: AI-written questions on any topic, an 8-tier ELO-style ladder, spaced repetition, and no ads on any tier. QuizDuel is the long-running social trivia game from MAG Interactive, with about 20 fixed categories and an ad-supported free tier. Choose LearnClash to learn and climb; choose QuizDuel to play casually with friends who already use it.

The two apps look similar from a store thumbnail: two players, a question grid, a winner. Underneath they are built on opposite ideas. QuizDuel is the 2020 relaunch of a franchise that started in 2012 under FEO Media (MAG acquired the studio in 2017): roughly 20 curated categories, fast social turns, ads funding the free tier. LearnClash flips every one of those choices. You name the topic, the AI writes and validates the questions, Glicko-2 math runs the ranking, and 3-stage spaced repetition handles what you keep.

A note on how this page is maintained. I first published this comparison in late March 2026, and I have re-checked it against MAG’s own reporting ever since: an April refresh when the Q2 numbers landed, another pass in May, and a full re-verification on July 31 after MAG published its Q3 report on June 24. Comparing my own app to a franchise this entrenched only stays honest if the receipts stay current.

Disclosure and method: I build LearnClash, so read this as a first-party comparison with the receipts shown. Every QuizDuel claim below comes from MAG Interactive’s published interim reports, the US and German store listings of both apps, MAG’s official game page, or a dated first-hand play session. All figures were re-verified on July 31, 2026.

QuizDuel vs LearnClash at a Glance

LearnClash is the any-topic ELO duel app with no ads. QuizDuel is the category-based social quiz from Nasdaq First North-listed MAG Interactive. Both deal 18 questions over 6 rounds. LearnClash gives 45 seconds per question and ranks every result on a Glicko-2 ladder. QuizDuel gives roughly 20 seconds and channels progress into leagues and streaks. Pricing and ad model split from there.

Dimension	LearnClash	QuizDuel
Topic system	AI writes questions on any topic you name; 34,157 in the pool across 655 topics	About 20 fixed categories (US listing says 20+ categories; the German listing counts 19 Sonderkategorien), 400,000+ curated questions
Round structure	18 questions over 6 rounds, 45s each	18 questions over 6 rounds, ~20s each
Ranking	8-tier ELO-style ladder on Glicko-2 (Iron to Phoenix)	Leagues and leaderboards, no published skill rating
Free tier	Full play, no ads	Ad-supported (“Contains ads” label on Google Play)
Premium	$7.99/mo or $59.99/yr, 7-day trial on yearly	VIP $5.99/mo US, €3.99/mo DE, 3-day trial
Publisher	Pluxia GmbH (Switzerland)	MAG Interactive (Stockholm, Nasdaq First North)
Launched	February 2026	2012 franchise (FEO Media); current app is MAG’s 2020 relaunch

QuizDuel’s installed-base edge is real: MAG’s game page counts 100M+ downloads since 2012, and the German-language version alone counts 44M+ players as of June 2025. The everyday picture is narrower than the lifetime headline, though. MAG’s whole portfolio counted 2.2M monthly active users in the Sep-Nov 2025 quarter, and the relaunched app sits in Google Play’s 10M+ download band.

Question Quality and Topic Flexibility

Two numbers frame this section: 400,000+ and 34,157. QuizDuel’s official page claims 400,000+ human-curated questions across its fixed categories. LearnClash’s pool held 34,157 validated questions across 655 topics in a database export from July 21, 2026, which is obviously the smaller figure.

The raw counts hide the part that matters: what happens when your topic is missing. QuizDuel cannot serve a category it does not have. LearnClash generates and validates a new one on the spot, so a duel on Ottoman sea battles or React Server Components is a text field away.

The quality question cuts both ways, and QuizDuel earns its half of it. A human-curated catalog battle-tested across a decade of play is consistent in a way a generator has to work at. LearnClash checks every AI question against the source topic before it enters a duel, and user downvotes retire bad items, so the pool improves each week instead of staying frozen. Whether the trade favors you comes down to whether the topics you care about already sit on QuizDuel’s roster.

Round Timing and Cognitive Load

Both apps deal 18 questions across six rounds, and the clock is the difference. LearnClash gives you 45 seconds per question; QuizDuel gives you roughly 20. Per round that is 135 seconds against 60, a 2.25x gap. Across a full duel it is 13.5 minutes of available thinking time against 6.

45 seconds against roughly 20. QuizDuel’s timer is tuned for snappy social back-and-forth; LearnClash’s window is long enough to read a long stem, re-read the options, and commit without panic.

On April 16, 2026 I ran a paired-device test, LearnClash on the primary phone and QuizDuel on a backup. QuizDuel’s 20-second timer pushed me into pattern-matching the shortest answer that looked right. On LearnClash’s 45-second window I found myself working through the wrong options on history and geography stems, reasoning instead of scanning.

Research backs this up. Short timers reward what you already know; long timers reward reasoning. Karpicke and Roediger’s Science paper on the critical importance of retrieval shows that repeated active retrieval, not repeated re-exposure, drives long-term recall. A 45-second window gives that retrieval a chance to happen instead of forcing a guess.

Ranking System: Where LearnClash Separates

LearnClash runs an 8-tier ladder: Iron (100 to 599), Bronze, Silver, Gold, Platinum, Emerald, Diamond, and Phoenix (2400+). Every player starts at 1300 in Gold II, the ladder average. Under the hood the ladder runs Glicko-2, the same rating math the big chess platforms adopted, surfaced in the app as a familiar ELO-style number. About 10 placement duels settle your tier; after that, an evenly matched win or loss moves the number about 20 points, so ranks settle fast and stay stable.

QuizDuel channels progression into leagues and leaderboards, including Question Streak Leagues, but as of July 2026 we found no published skill rating, Elo, Glicko, or otherwise, in its store listings, official game page, or MAG’s reports. Matchmaking pairs you with friends or random opponents. A random opponent might fold in two rounds or crush you with a decade of muscle memory, and your league position tells you how much you played this week, not how good you are.

This is the widest gap between the two apps. A fresh LearnClash account swings hard while Glicko-2’s rating deviation is still high, then settles into a tier where a Silver III player really is weaker than a Gold I on the same topic. Full mechanics are in our ELO rating system explainer.

Learning Depth: A Review Loop vs No Review Loop

Both apps now have a mode called Solo, which is confusing, because the two modes do completely different jobs. QuizDuel’s Solo Mode is quest-and-boss progression: chapters, streaks, a Boss battle. LearnClash’s Solo mode runs 3-stage spaced repetition on every question you have seen, and QuizDuel’s official materials list no review or study feature at all. We checked the US and German store listings, Google Play, MAG’s game page, and the two most recent interim reports, all as of July 31, 2026. None of them documents a mechanism that brings a missed question back.

Three memory states on one side, none on the other. A LearnClash question cycles through Learning, Known, and Mastered; a QuizDuel question is gone the moment the round ends.

What the three states look like in practice:

• Learning: the question is new or you missed it recently, so it cycles back soon
• Known: you have answered right once, returning after a 7-day cooldown
• Mastered: stable recall across the 90-day interval, then it exits the review pool

Questions advance from Learning to Known to Mastered as you answer correctly across spaced reviews, and drop back a stage when you miss. The mechanic rests on the testing effect: recall under spaced review beats re-reading.

If you use a quiz app to study, the review loop is not a nice-to-have. The flashcard world settled this argument years ago (see Anki vs Quizlet, where Anki’s FSRS-6 scheduler outperforms the older SM-2 algorithm while Quizlet keeps its Learn-mode spacing behind a paywall), and QuizDuel has neither side of that comparison. It is a game, was built as one, and its official materials never claim otherwise.

Multiplayer Formats

LearnClash duels are 1v1. They run in real time when both players are online; when they are not, the duel continues as an async challenge with a 72-hour turn window. Three duel types sit on top: open duels (match me with anyone at my ELO), closed duels (invite a specific player), and onboarding duels (low-stakes first plays for new accounts).

QuizDuel Classic is async turn-based against friends or random opponents: six rounds, three questions each, four answer options, with the category pick alternating between players (the chooser picks one of three). Around Classic, QuizDuel runs Arena, a real-time-style battle against up to four other players, plus Teams (Germany November 2025, worldwide December 2025) and Quinder, a true-or-false swipe format.

The async spine is what makes this category work for adults. You pick up a match on your commute and finish it at lunch, and your opponent is never blocked. If you want a live host quizzing a room instead, that is a different kind of app entirely; see our Kahoot vs Gimkit comparison.

QuizDuel takes the group-format crown here, since Teams and Arena give it more ways to play with more people at once. LearnClash takes the quality-of-match crown, because ELO pairing plus a live 1v1 when you are both online beats a random opponent on any format list.

What QuizDuel Ships in 2026: Arena, Solo Quests, Teams, and Quinder

QuizDuel’s mode roster is broad, and it keeps growing. Arena battles against up to four other players. Solo Quests capped by Boss battles. Weekly and monthly Special Events. Question Streak Leagues. Quinder, a true-or-false swipe mode. Teams, which launched in Germany in November 2025 and worldwide that December. What we could not find anywhere in it, as of July 2026, is a scheduled-review loop.

A map of what each mode does and does not do:

QuizDuel mode	What it adds	What it does not add
Arena	Real-time-style battles vs up to 4 other players	Cross-session memory, scheduled review
Solo Quests + Boss battles	Single-player progression with boss stages	Spaced repetition, per-topic skill rating
Special Events	Weekly and monthly themed quizzes	Persistent skill profile
Question Streak Leagues	Streak-based league climbing	A published skill rating
Quinder	True-or-false swipe rounds	Any review of missed answers
Teams (Nov/Dec 2025)	Collaborative team mode and team events	A way to bring back what you got wrong

One pipeline note for completeness. MAG’s Q1 FY2025/26 report said two new puzzle game cores were in testing, targeted to go live in its biggest games in early 2026. The Q3 report, published June 24, 2026, confirms major product updates shipped in the period without naming them, so treat the puzzle cores as unconfirmed for QuizDuel specifically.

The 2026 quiz-app product cycle has split, and this roster shows which side QuizDuel picked. Social-game shops add engagement loops, modes, events, and team structures; learning-app shops add retention loops. The same split runs through our LearnClash vs Trivia Crack refresh. QuizDuel keeps delivering more ways to play casually; none of the new modes brings back what you got wrong.

AI Strategy: Curated Categories vs Any-Topic Generation

LearnClash and QuizDuel made opposite content bets. QuizDuel ships a curated catalog of 400,000+ questions across roughly 20 categories, refreshed through Events and seasonal quizzes. LearnClash uses AI to generate questions on demand for any user-named topic, validated before each duel, plus a Clash Chat tutor that explains wrong answers in plain language.

What that looks like across the loop:

Stage	QuizDuel	LearnClash
Question authoring	Human-curated catalog, refreshed by Events	AI-generated on demand, any topic, validated before serving
Difficulty matching	No difficulty tiers in the store materials	Easy / Medium / Hard tuned to your ELO
Wrong-answer handling	Move on	Clash Chat tutor explains why, in 1-2 sentences
Follow-up questions per duel	0	Ask the Clash tutor anything about the answer
Retention engine	None found in official materials	3-stage spaced repetition, 7-day and 90-day intervals

The Clash Chat surface deserves a sentence of its own. When you miss a question, the tutor explains why and answers follow-ups; players mostly ask “Why is that the answer?” and “What is the difference between X and Y?”; when you miss on QuizDuel, you move on.

The strategic divergence matters more than the feature table. QuizDuel treats content as periodic events: weekly themed quizzes, monthly specials, seasonal wrappers around a fixed catalog. LearnClash treats content as compounding inventory, where every duel adds validated questions to the shared pool and match quality improves as the pool deepens per topic. This is also why the 3-stage SRS matters more than the generator itself: producing a fresh question is cheap, while bringing the right question back at the right interval is what makes anything stick. Our SRS retention curve walks through how the 7-day and 90-day intervals work.

The Ad Model: How MAG Monetizes QuizDuel

Advertising is roughly half of MAG Interactive’s business: 35.4 MSEK from ads against 35.3 MSEK from in-app purchases in the Sep-Nov 2025 quarter. And the model is working. December 2025 gave QuizDuel its highest daily revenue since the 2020 relaunch, MAG described Q2 FY2025/26 as a record QuizDuel revenue quarter, and the Q3 report published June 24, 2026 says QuizDuel still had an exceptionally good quarter in terms of revenues, with QuizDuel and Wordzee as the group’s two largest revenue generators. Nobody should read this section as “QuizDuel is struggling”; the question worth asking is what funds the run, and who sits through it.

Roughly 50/50 between advertising and in-app purchases at group level. The ad half is what free-tier players experience as breaks between rounds.

The group-level numbers, from MAG’s Q1 FY2025/26 interim report:

MAG group metric (Sep-Nov 2025)	Value	Note
Daily active users	0.9M	Whole portfolio; MAG publishes no QuizDuel-only DAU
Monthly active users	2.2M	Whole portfolio
Monthly unique payers	44K	About 2% of MAU
Revenue per DAU	9.3 US cents	Portfolio-wide average
Advertising vs IAP revenue	35.4 vs 35.3 MSEK	Roughly 50/50

This is not a moral point. It is a product point. If your quiz session is 3 minutes of play wrapped in 2 minutes of ads, only 60% of your session is play, and Google Play makes the difference visible at the store level: QuizDuel’s listing carries the “Contains ads” label, LearnClash’s does not, because the app ships zero third-party ad SDKs. QuizDuel’s ad load is not a decline signal or an accident; it is the business model, and MAG’s own reports show it working.

Pricing and Premium Tiers

The sticker prices first. On the LearnClash side, Premium runs $7.99 monthly or $59.99 yearly, and the yearly plan opens with a 7-day free trial. The LearnClash pricing page has the current plan comparison. QuizDuel VIP is $5.99/month in the US and €3.99/month in Germany, with a 3-day free trial. QuizDuel also sells a one-off $0.99 purchase that removes ads for 30 days, plus Qoin currency packs from $0.99 to $19.99.

VIP is cheaper. The interesting question is what each subscription buys, tier by tier:

Tier	LearnClash	QuizDuel
Free	Full play, no ads	Play with ad breaks (“Contains ads” on Google Play)
Paid	Anytime AI topic creation (up to 100 in library), advanced stats	Ad removal in classic games, up to 100 simultaneous games, daily bonuses
Trial	7 days, on the yearly plan	3 days on VIP

The real question is what you are paying to change. On LearnClash the free tier is already ad-free, so Premium adds capability: more AI topics, more stats, deeper solo schedules. On QuizDuel the headline VIP perk removes the ads the free tier inserted, and the store copy scopes even that removal to classic games. Paying for upside and paying to unbreak an app are different purchases, whatever the stickers say. QuizDuel is cheaper on paper but sells back the quiet; how much that trade weighs is scored app by app in our best trivia apps of 2026 roundup, which rates free-tier play separately from paid features.

Community, Scale, and What the Store Ratings Say

The scale gap is real, and it deserves plain numbers. The QuizDuel franchise counts 100M+ downloads since 2012 and 38M in-game friendships, per MAG’s official game page, which calls it “Europe’s leading mobile trivia game.” The German-language version alone counts 44M+ players as of June 2025. Two caveats keep that honest: the current app is the 2020 relaunch, shown in Google Play’s 10M+ band, and MAG’s group-wide active base is 2.2M MAU across all its games.

LearnClash, launched in February 2026 by Pluxia GmbH, is tiny next to any of those figures; our own Google Play listing shows 500+ downloads. We publish that number here because leaving it out of our own comparison would be cherry-picking.

Ratings, read directly from the store pages on July 31, 2026:

App and store	Rating	Count	Notes
QuizDuel, App Store (US)	3.6	77	Age rating 4+
QuizDuel, App Store (DE storefront)	2.3	7,377	Same app ID, German rating pool
QuizDuel, Google Play	3.5	116,115	10M+ downloads; “Contains ads” label
LearnClash, App Store (US)	5.0	7	No written reviews yet
LearnClash, Google Play (DE view)	4.7	11	US view shows no rating yet

Read the LearnClash rows with the caveat they deserve: 18 ratings is a start, not a track record. The QuizDuel rows carry more signal, especially the German storefront’s 2.3 from 7,377 ratings. Recent reviews we read on both stores cluster around two themes: monetization backlash, from long-time buyers of the original premium app who were moved to the free relaunch with ads and a subscription, and technical friction, including freezes at startup, lost rankings, and repetitive questions.

If your mum, your coworkers, and your school group chat are already on QuizDuel, the network effect is real, and in Germany it very often is. QuizDuel wins on installed base and brand, DACH in particular; no ratings table changes that.

Picking a Side

LearnClash is the pick if any of these describe you:

• You want to get better at a specific topic (vocabulary, exam prep, history, coding)
• You care about a ranking that moves, and a ladder where your spot means something
• You refuse to watch mid-round ads, on principle or on time-on-task grounds
• You want to duel on a topic outside QuizDuel’s fixed categories
• You want a review loop that brings weak spots back at spaced intervals

The way I draw the boundary when someone asks me which app to get: LearnClash is for people who want to improve at something, not just score points on it. (For more on the competitive-learning side, our LearnClash vs QuizUp comparison covers the app that defined the genre.)

QuizDuel is the better pick in a few equally real cases:

• Your friends and family are already on it (DACH region in particular)
• You only want fast 60-second social rounds across pop-culture categories
• Group formats matter to you: Teams events and Arena battles with up to four other players
• You have played the franchise for years and your profile carries real memories

There is nothing wrong with QuizDuel as a game. It is a good one, and the franchise has had 14 years to polish the social-turn loop, even if today’s app is the 2020 relaunch.

One Duel Screen, Two Different Products

LearnClash vs QuizDuel is really a fight between two product types that happen to share a duel screen. LearnClash is a competitive learning app: any topic, AI questions validated before serving, an 8-tier ladder on Glicko-2, spaced repetition in every mode, no ads on any tier. QuizDuel is a 14-year-old social trivia franchise in strong commercial health: record revenue quarters, a household German brand, steady updates through late July 2026 (v1.68.08), and an ad-supported free tier that funds it all.

If you want ranks that mean something, questions on the exact topic you care about, and 13.5 minutes of thinking per duel with zero ad breaks, LearnClash is the build. If you want the game your group chat already plays, QuizDuel earned that spot honestly; and if neither shape fits, our games like Blooket roundup covers the wider field.