Comparison

Cây Study vs OpenQuiz AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Cây Study

This language learning app focuses on pronunciation, offering AI-powered feedback on tone and intonation. It includes over 1000 vocabulary and grammar exercises, plus practice tests with explanations to improve all four language skills.

Highlights
  • AI pronunciation analysis and feedback
  • 1000+ vocabulary and grammar exercises
  • Comprehensive skill development (4 skills)
  • Realistic practice tests with explanations
  • Personalized course packages
  • AI scoring and answer analysis
Features
Read full description

Với sứ mệnh đem đến kiến thức ngôn ngữ tốt nhất, Cây Study đã ra đời. Đây là một ứng dụng học ngôn ngữ độc đáo, mang lại trải nghiệm học tập chất lượng, linh hoạt và tiện lợi ngay trên điện thoại của bạn. Dành cho những ai yêu thích học ngôn ngữ, Cây Study tập trung vào việc giúp bạn học phát âm như người bản địa. Với khả năng phân tích và gợi ý về giọng điệu, ngữ điệu, bạn sẽ dễ dàng tiếp xúc và học theo cách tự nhiên. Tích hợp hơn 1000 bài luyện từ vựng, ngữ pháp và 4 kỹ năng, Cây Study giúp bạn nâng cao trình độ một cách toàn diện. Không chỉ vậy, ứng dụng còn cung cấp hơn 100 bài thi thử giống như thi thật, với giải thích và gợi ý để bạn tự tin hơn trong mỗi bước tiến mới. Với gói khóa học đa dạng, tùy theo nhu cầu cá nhân, bạn có thể chọn cho mình những học phần phù hợp. Và cùng với tích hợp AI chấm điểm và phân tích đáp án, bạn sẽ luôn biết mình đang ở đâu và cần cải thiện điều gì. Cây Study không chỉ là ứng dụng học, mà còn là người bạn đồng hành trung thành trên con đường chinh phục ngôn ngữ. Đắm chìm vào học tập với Cây Study ngay hôm nay và khám phá sức mạnh của tri thức ngôn ngữ!

About

OpenQuiz AI

Transform any text or image into interactive flashcards for language learning. Practice speaking with AI conversations that provide pronunciation and grammar feedback. Ideal for exam preparation and mastering over 50 languages.

Highlights
  • Photo and text to flashcard conversion
  • AI conversation practice with pronunciation feedback
  • Spaced repetition system (SRS) for memorization
  • Exam preparation modules (IELTS, TOEFL, HSK, etc.)
  • Grammar and sentence-building drills
  • Sync across multiple devices
Features
Read full description

Turn any photo, text or word list into flashcards, then actually use the words — in AI conversations with pronunciation feedback. OpenQuiz AI is the all-in-one vocabulary and speaking app for Spanish, French, Japanese, Korean, Chinese, English and 50+ languages. PREPARING FOR AN EXAM? • IELTS Speaking: practice Parts 1–3 with an AI examiner and get band-style feedback on fluency, vocabulary, grammar and pronunciation • TOEFL, TOEIC, SAT & GRE vocabulary: build your own sets from a photo of the book, or study sets shared by other learners • AP Spanish, AP French and other speaking exams: pick a theme, talk with the AI, get corrected sentence by sentence • HSK 1–6, JLPT N5–N1, TOPIK I–II: exam-tagged word sets and a review schedule that fits your test date HOW IT WORKS 1. CREATE — snap a photo of your textbook, paste text or type a list. AI extracts the words with definitions, examples, images and native audio. 2. MEMORIZE — flashcards, dictation, fill-in-the-blank, quizzes and games, all scheduled by spaced repetition (SRS) so you review right before you would forget. 3. SPEAK — start an AI Call on any topic. The AI works your new words into the conversation, scores your pronunciation, fixes your grammar, and a coach mode guides you phrase by phrase until you get it right. MORE • Reading passages with natural audio and tap-to-look-up on every word • Grammar and sentence-building drills • Courses and learning paths built by the OpenQuiz team • Home-screen widget with today's reviews • Sync across iPhone, iPad, Mac, web and the Chrome extension • Free to start, no credit card required Trusted by 120,000+ monthly learners. Premium is an auto-renewing subscription that unlocks unlimited AI conversations, lesson generation and advanced feedback. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings › Apple ID › Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://openquiz.ai/en/privacy-policy.html

Screenshots

Cây Study4 screens
OpenQuiz AI4 screens

Verdict

The call

The clearest difference is review sentiment: Cây Study at 96% against OpenQuiz AI's 44%. Cây Study also leads on ads (none vs shown) and rating (5.0 vs 4.7). OpenQuiz AI's advantage is ratings volume (95 vs 1) and update cadence (every 3 days vs fortnightly). On price, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Cây Study sells 10 one-off in-app purchases and OpenQuiz AI sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Cây Study holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: OpenQuiz AI has 95 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 96% of Cây Study's written reviews are positive against 44% of OpenQuiz AI's.

UpkeepUpdate frequency

Cây Study ships an update fortnightly, OpenQuiz AI every 3 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
Cây Study versus OpenQuiz AI: the parameters behind the verdict, then further details
ParameterCây StudyOpenQuiz AI
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (95 ratings)
Positive reviews96.1% of reviews — better44.4% of reviews
Number of ratings195 — better
Update frequencyFortnightlyEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.515.0 — better
Further details — not scored
Size37 MB41 MB
Age rating4+12+
DeveloperEdmicroOPENQUIZ COMPANY LIMITED

Customer experience

Cây Study

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews51 reviews
Positive96.1%
Neutral2.0%
Negative2.0%

OpenQuiz AI

All ratings95 ratings
Positive91.6%
Neutral6.3%
Negative2.1%
Written reviews9 reviews
Positive44.4%
Neutral33.3%
Negative22.2%

In-app purchases

10 purchases

Cây Study

One-time10
  • Khóa từ vựng TOEIC 450-700$2.99
  • Từ vựng TOEIC 0-450$2.99
  • Khóa từ vựng TOEIC 700+$2.99
Show 7 more
  • Phát âm tiếng anh$2.99
  • 3000 từ vựng tiếng anh$4.99
  • Từ vựng IELTS Ban0-4.5$6.99
  • Bộ 20 đề IELTS thi online$6.99
  • Từ vựng IELTS Band 4.5-5.5$7.99
  • Từ vựng IELTS Band 6.5+$9.99
  • Từ vựng IELTS Band 5.5-6.5$9.99
3 purchases

OpenQuiz AI

Subscriptions3
  • OpenQuiz Premium$9.991 Month
  • OpenQuiz Premium$19.993 Months
  • OpenQuiz Premium7 Days trial$39.991 Year

Questions

Is Cây Study free?
Cây Study is free to download, with in-app purchases available.
Is OpenQuiz AI free?
OpenQuiz AI is free to download, with in-app purchases available.
Which has better reviews, Cây Study or OpenQuiz AI?
Cây Study is rated higher. Cây Study averages 5.0 out of 5 from 1 ratings, while OpenQuiz AI averages 4.7 from 95 ratings.
Do Cây Study or OpenQuiz AI have ads?
OpenQuiz AI shows ads; Cây Study does not.
Which is updated more often, Cây Study or OpenQuiz AI?
Cây Study ships an update fortnightly, and OpenQuiz AI every 3 days. Most recently, Cây Study was updated on November 3, 2026 and OpenQuiz AI on November 7, 2026.

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