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DuoCards: Vocabulary Builder icon

How much does DuoCards: Vocabulary Builder earn?

iOS app from DuoCards s.r.o · News

ML forecast ★ 4.7 · 2K → Stable Freemium

~9.4K/mo

ML revenue forecast. Calibrated against 2520 apps in this category.

Confidence band
±15%
High — many comparable apps with verified data

At a glance

What the app looks like

Live screenshots from the App Store, captured by our snapshot worker. Tap any image to enlarge.

DuoCards: Vocabulary Builder screenshot 1 DuoCards: Vocabulary Builder screenshot 2 DuoCards: Vocabulary Builder screenshot 3 DuoCards: Vocabulary Builder screenshot 4

DuoCards: Vocabulary Builder's revenue trajectory

Forecast revenue from snapshot history. Last 24 months.

Where DuoCards: Vocabulary Builder sits in News

Revenue distribution of 2520 comparable apps. DuoCards: Vocabulary Builder highlighted.

DuoCards: Vocabulary Builder vs comparable apps

Revenue trajectory side-by-side. Bold = DuoCards: Vocabulary Builder, ghosted = peers.

App spec

Version
1.20.17
Last update
Aug 29, 2026
Launched
Apr 15, 2020
Min OS
13.0
Rating
4+
Price
Free
Monetization
Freemium
Languages
EN

What DuoCards: Vocabulary Builder actually does (from App Store listing)

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, F…
Read full description →

🆕 What's new · v1.20.17

AI Roleplay - Practice real-world conversations in simulated scenarios AI Stories - Interactive stories with comprehension exercises Bookmarks - Save your current progress in an article for later Transliteration - Read Chinese, Arabic, Japanese scripts easily Auto Dark Mode - Study comfortably day or night Smarter Translations - Context-aware translations AI Grammar Feedback - Accurate corrections with explanations

Comparable iOS apps

The five apps in News with the closest revenue to DuoCards: Vocabulary Builder. Click any to see its detail page.

AppRevenueRatingRatings
TLC Practice exam 2.0 icon TLC Practice exam 2.0 9.4K ★ 4.7 2K
LetterSchool - Block Letters icon LetterSchool - Block Letters 9.4K ★ 4.4 2K
Team Shake icon Team Shake 9.4K ★ 4.8 2K
ASL Dictionary Sign Language icon ASL Dictionary Sign Language 9.4K ★ 4.7 2K
The Fourth Dimension icon The Fourth Dimension 9.3K ★ 4.7 2K
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How we calculated this

Each forecast combines App Store rating, ratings count, monetisation model, pricing tier, IAP signals and ad-supported flag. The base estimate is then multiplied by a per-category scaling factor learned from apps with founder-verified MRR. Every number on this page comes from public APIs and Bumetric's own snapshot history.

Full methodology covers input variables, accuracy bands per category and how we treat apps without comparable anchors. See also the live data on DuoCards: Vocabulary Builder's tracker page for current rating, reviews and snapshot timeline.

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