DuoCards vs Flember
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DuoCards
Master a new language with interactive flashcards and video courses. This app helps you build vocabulary, guess words, and track your progress across over 50 languages. Learn effectively through spaced repetition and integrated translation tools.
- Flashcard learning with spaced repetition
- Video language courses with interactive subtitles
- Integrated translator for over 50 languages
- Vocabulary builder and progress tracker
- Guess words and phrases to sharpen skills
- Read foreign language articles
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Build vocabulary from the real content you already enjoy. DuoCards helps you save new words from videos, articles, shared decks, and your own notes, then remember them with smart flashcards and spaced repetition. Why learners choose DuoCards: - Save words and phrases from videos, subtitles, and articles - Practice with an AI tutor for real-life conversations - Improve pronunciation with instant feedback - Review vocabulary with flashcards that adapt to your progress - Learn English, Spanish, French, German, Japanese, Korean, and 50+ languages - Use ready-made courses, public decks, or your own personal word lists Learn in a simple loop: 1. Discover useful words in context 2. Save them to your personal deck 3. Review, speak, listen, and remember Whether you are learning for travel, school, work, or everyday conversations, DuoCards gives you a flexible way to build vocabulary and keep it in memory. Download DuoCards and start building your language habit today. Terms of use: https://www.duocards.com/termsofuse.html Privacy policy: https://www.duocards.com/privacypolicy.html
Flember
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Flember is your all-in-one study app. Create AI-powered study journeys, dynamic flashcards, quizzes and boost memory with spaced repetition. AI-Powered Study Journeys: Chat with our smart assistant to generate a personalized, gamified study roadmap tailored to your goals—just like having a personal tutor guiding you every step of the way. Dynamic Flashcards: Create and customize flashcards in various formats, including front/back, single choice, cloze deletion, dialogue with audio, and reading mode with integrated audio, to suit your learning style. Spaced Repetition: Boost retention and recall with our built-in spaced repetition system, ensuring that you review content at optimal intervals for long-term memory retention. YouTube Integration: Import videos directly from YouTube to learn with real-world content. Follow along with live transcripts, tap on phrases for instant translations, and convert key moments into flashcards. Seamless Importing: Easily migrate your existing study materials by importing flashcards from Anki, keeping all your essential learning tools in one convenient place. Terms of Service: https://flember.com/terms-and-conditions Privacy Policy: https://flember.com/privacy-policy
Screenshots
Verdict
The clearest difference is ads: Flember at none against DuoCards's shown. DuoCards's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Flember sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
DuoCards ships an update monthly, Flember every 6 weeks. The most recent releases landed on September 22, 2026 and May 17, 2026 respectively.
| Parameter | DuoCards | Flember |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.3K ratings) — better | — |
| Positive reviews | 63.3% of reviews | — |
| Number of ratings | 1.3K — better | — |
| Update frequency | Monthly — better | Every 6 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 19 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | DuoCards s.r.o | Victor Igor Gomes Martins |
Bugs and requests
DuoCards
Reported bugs
4 issues- App freezes and crashes
- Issues with logging in and accessing content
- Inconsistent behavior when adding new words
- Problems with video playback and subtitles
Requested features
4 requests- Offline mode
- More customization options
- Improved spaced repetition system
- Better integration with other language learning tools
Flember
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DuoCards
- DuoCards Premium2 variants$19.991 Month
- DuoCards Plus$33.003 Months
- DuoCards Premium$34.993 Months
Show 7 moreShow fewer
- DuoCards Premium$49.991 Year
- DuoCards Premium7 Days trial$64.901 Year
- DuoCards Premium7 Days trial$67.991 Year
- DuoCards Premium1 Year trial$107.991 Year
- DuoCards Premium7 Days trial$109.001 Year
- DuoCards Premium7 Days trial$113.991 Year
- DuoCards Premium1 Year trial$162.991 Year
Flember
- Pro Monthly7 Days trial$4.991 Month
- Pro Monthly7 Days trial$14.901 Month
- Max Monthly7 Days trial$24.991 Month
Show 3 moreShow fewer
- Pro Yearly7 Days trial$39.991 Year
- Pro Yearly7 Days trial$89.901 Year
- Max Yearly7 Days trial$199.991 Year









