KnowScroll vs Curium
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
KnowScroll
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You meant to check your feed for 5 minutes and lost an hour. Knowscroll keeps the swipe and changes what is on the card: full-screen Wikipedia articles, one after another. Choose the languages and topics you care about, then open the feed. Each card shows an article's lead image, title, and summary. Tap it to read the full piece. The For You tab learns from the cards you read, like, and save, then mixes in more of what holds your attention. Knowledge in 13 languages Wikipedia has millions of articles. Knowscroll draws from 13 editions: English, Vietnamese, Japanese, French, German, Spanish, Chinese (Simplified and Traditional), Korean, Portuguese, Thai, Indonesian, and Hindi. The free plan can follow 2 languages at a time; Premium unlocks all 13. 15 topics cover history, science, technology, philosophy, geography, literature, art, music, film, health, sports, religion, mathematics, society, and food. The same topic through another culture Compare cards place an article and its counterpart from another language edition side by side. On the free plan they appear every 5 to 8 cards. Premium brings one every 2 to 4. Test what you remember Trivia turns articles into 5 questions with 4 answers each. Play the daily set, or answer questions drawn from pieces you have already read. Premium unlocks Trivia. Keep what you want to read again Double-tap a card to bookmark it. The free plan keeps up to 10; Premium removes the limit. Search helps when you want a specific subject instead of a surprise. Free, with a one-time upgrade It is free to download, and ads keep it that way. Premium is a single purchase: it removes ads, unlocks Trivia and all 13 languages, lifts the bookmark limit, and shows Compare cards every 2 to 4 cards. Your data No account, no sign-up. Bookmarks and preferences stay on your device. On iPhone you can back them up to iCloud and restore them on another device. Requires iOS 16.4 or later. Download Knowscroll and give your next scroll something worth reading. Privacy Policy: https://blueducklabs.xyz/apps/knowscroll/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Curium
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Curium is the feed you leave knowing something new. You already scroll every day. Might as well come out of it more curious. Curium turns knowledge into vertical cards: one idea at a time, and something to tell someone tonight. History, science, geography, art, economics, languages, technology β you pick your topics and your level, and the app builds your feed. HOW IT WORKS β’ A vertical feed of knowledge cards: you scroll, you learn. β’ Quick quizzes to check it actually stuck. β’ "Go deeper" on any card when a topic grabs you. β’ The Daily Quiz: the same questions for everyone, so you can compare scores with friends. WHAT KEEPS YOU COMING BACK β’ A daily goal built to last: 4, 6 or 10 cards. β’ A streak to protect, plus quests and badges to earn. β’ XP for everything you do, and a weekly league that resets every Monday. β’ A review queue that brings an idea back just before you'd forget it (spaced repetition). β’ A mastery bar for each topic: how much of the catalog you've really learned. Because scrolling isn't learning. β’ A Home Screen and Lock Screen widget: today's question, and your streak. SHARE IT β’ Turn a card into an image for your story. β’ Send a friend a challenge: they answer the same question, whether or not they have the app. WITHOUT A SUBSCRIPTION β’ 4 new lessons a day, plus one more by watching an ad. A lesson you've already opened stays open. β’ 20 reviews a day. β’ Beginner and Intermediate levels. β’ One path a month, yours to keep forever. β’ Ads. CURIUM+ (OPTIONAL SUBSCRIPTION) β’ No ads. β’ Unlimited lessons, and your whole review queue the same day. β’ Every difficulty level, up to Expert. β’ Every path: one topic, a known number of cards, and a real ending. β’ Offline mode: take a path or your reviews on a plane, a subway ride or a vacation. β’ A streak shield that recharges: miss a few days without losing everything. WHAT WE DON'T DO We never read your contacts, your photos or your location. Your data is hosted in the European Union. You can download everything Curium knows about you, or delete your account instantly and permanently, from Settings. β Curium+ is an auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the end of the period. You can manage or cancel your subscription at any time in your App Store account settings. Terms of Use: https://curium.ctopass.com/conditions Privacy Policy: https://curium.ctopass.com/confidentialite
Screenshots
Verdict
The clearest difference is update cadence: Curium at every 3 days against KnowScroll's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. KnowScroll sells 1 one-off in-app purchase and Curium sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
KnowScroll ships an update every 8 days, Curium every 3 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | KnowScroll | Curium |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 days | Every 3 days β better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 | 16.4 |
| Further details β not scored | ||
| Size | 74 MB | 46 MB |
| Age rating | 4+ | 12+ |
| Developer | Vu Viet Duc | Quentin Drumez |
In-app purchases
KnowScroll
- Lifetime Premium$49.99
Curium
- Curium+ Monthly$1.991 Month
- Curium+ Annual$17.991 Year









