Prep vs Cây Study
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prep
Prepare for English proficiency exams like IELTS and TOEIC with AI-powered practice tests and personalized study plans. Get detailed feedback and track your progress to achieve your academic goals.
- AI Virtual Practice Room for IELTS
- Personalized Study Plans
- Mock Tests for Various Exams
- Detailed Grading and Evaluation
- Progress Tracking
- AI Error Detection and Correction
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- The Prep AI Virtual Room Duo: For IELTS preparation, the virtual practice room with Prep AI helps students comprehensively train all four skills: IELTS Listening, IELTS Reading, IELTS Writing, IELTS Speaking. Students can also practice with exam-format questions, and receive thorough grading and evaluation according to each scoring criterion, just like a real examiner. With advanced AI technology, the system can detects errors during IELTS test and provides appropriate corrections. What's amazing is that the AI uses the same evaluation method as the IELTS test scoring system, giving students a realistic experience similar to taking the actual IELTS test. Exciting, isn't it? PREP also offers many useful features to support students learn English more effectively, such as: • Study Plan: The system helps students learn English more easily by analyzing the goals set by students, then arranging a suitable study path divided into separate lessons and english test, ensuring students achieve their desired goals. The system also accompanies students throughout the learning process to answer questions and update their English learning path. • My Course: A place to aggregate and store English learning and english test programs, helping students easily control their learning progress. Students can click on the desired program to join the corresponding English course • Test Practice: One of the most useful features of the software: Mock Tests. With a diverse library of tests divided into four skills, a large number of english test like IELTS, TOEIC,... tests help students quickly familiarize themselves and develop their test-taking skills. Additionally, the system provides prediction tests to help students get used to the structure of the most recent year's test, increasing the applicability of this feature. • Prep has been helping over 10,000+ students improve daily, assisting thousands in achieving their study goals for IELTS, TOEIC, and national high school exams. • Prep features proprietary modern AI technology capable of recreating the test environment in a virtual test room, providing students with the most realistic experience during test preparation. • Prep offers diverse and useful features suitable for various user goals, whether learning English, practicing for TOEIC, or prep for IELTS Contact us immediately when you need support: Email: support@prepedu.com
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.
- 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
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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!
Screenshots
Verdict
The clearest difference is ads: Cây Study at none against Prep's shown. Cây Study also leads on rating (5.0 vs 4.6) and review sentiment (96% vs 86%). Prep's advantage is ratings volume (123 vs 1) and update cadence (every 5 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
Both are free to download. Prep sells 10 one-off in-app purchases and Cây Study sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Cây Study holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Prep has 123 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of Prep's written reviews are positive against 96% of Cây Study's.
Prep ships an update every 5 days, Cây Study fortnightly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | Prep | Cây Study |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (123 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.7% of reviews | 96.1% of reviews — better |
| Number of ratings | 123 — better | 1 |
| Update frequency | Every 5 days — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 135 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | PREP TECHNOLOGY JOINT STOCK COMPANY | Edmicro |
Customer experience
Prep
Cây Study
In-app purchases
Prep
- IELTS Pro 1 tháng$9.99
- IELTS Pro 3 tháng$19.99
- IELTS Pro 6 tháng$29.99
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- IELTS Core 3개월 이용권$59.99
- HSK 3 ver 3.0$69.99
- HSK 3 ver 3.0 Pro$89.99
- IELTS Core 연간 이용권$129.99
- 90-Day IELTS TP Package$139.99
- HSK1 đến HSK3 ver 3.0$149.99
- HSK1 đến HSK3 ver 3.0 Pro$179.99
Cây Study
- Khóa từ vựng TOEIC 450-700$2.99
- Từ vựng TOEIC 0-450$2.99
- Khóa từ vựng TOEIC 700+$2.99
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- 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








