Source-backed analysis9
Review basis
Research-based review: the AppDuo Editorial Team compiled it from official pages, documentation, app stores, press and user feedback, without hands-on testing. Every claim links to a source with the date it was checked.
9 reference sourcesInformation updated Nov 11, 2026
How we review
STUDY4 Review
Web and iOS exam practice for IELTS, TOEIC and HSK from a Hanoi company
By AppDuo Editorial Team · Updated
- Web
- iOS
On this page
Decide at a glance
Our verdict
STUDY4 suits Vietnamese-reading learners preparing for IELTS, TOEIC or HSK who want a test library that mirrors the real exams and prefer buying courses one by one on the web rather than paying monthly. The trade-offs: a Vietnamese-only interface, almost no public ratings (one on the new iOS app), and no stated access period on the pricing page.
Best for: Learners practising IELTS, TOEIC or HSK online who read Vietnamese
Skip it if: Learners who do not read Vietnamese, as the interface and courses are mostly in Vietnamese
Pros
- Covers TOEIC, IELTS Academic and General, HSK and basic English; Tuoi Tre and VTC News report over 3,000 tests
- Per the official site: spaced-repetition flashcards, daily and per-question-type statistics, and AI grading of speaking and writing
- Free trial before buying and a published 7-day refund policy
Cons
- Vietnamese-only interface
- Struck-through prices 14% to 60% above the selling price and no stated access period make the real discount hard to judge
All pros and cons · Who is it for?
Pros
- Clearly lists the legal entity, company number, hotline and email
Cons
- The iOS in-app purchase costs 1,499,000 VND for one month, more than most single web courses, and the listing does not say whether it auto-renews
- Almost no public ratings: the iOS app reached the App Store on 5 November 2026 and has one rating; the two press pieces read as promotional
Best for
- Learners who prefer buying single courses on the web over a monthly fee
Skip it if
- Buyers who want independent evidence of results or public ratings before paying
Experience & key features
What STUDY4 is
STUDY4 is run by A Plus Technology Co., Ltd of Hanoi (registered 17 June 2021). It sells online exam-prep software for TOEIC, IELTS, HSK and basic English, alongside a test library, an English-Vietnamese dictionary and flashcards. Tuoi Tre and VTC News report more than 2 million users and over 3,000 tests; the homepage claims over 1 million monthly active learners. These figures come from the vendor or promotional articles and have not been independently audited.
Key features
Per its about page, tests and lessons follow real exam formats under the CEFR framework, with personalised roadmaps, spaced-repetition flashcards, mini-games, daily and per-question-type statistics, and AI grading of pronunciation, speaking and writing. Per VTC News, IELTS Intensive targets learners at band 4.0 aiming for 7.0+, and Complete TOEIC targets 450+, 650+ and 800+. The company's AI policy says users may be interacting with AI systems and that it will take steps to make this apparent.
Pricing and refunds
On the web STUDY4 sells per course, not per month: each IELTS or HSK course costs 799,000 VND, TOEIC courses 1,050,000 VND, Practical English courses 599,000 VND, and combos 1,050,000 to 1,950,000 VND. Every price sits next to a much higher struck-through one, so compare what you actually pay rather than the discount; no access period is stated. The iOS app instead offers a "Toàn bộ chương trình học (1 tháng)" (all programmes, one month) in-app purchase at 1,499,000 VND. Refunds can be requested within 7 days in four listed cases, and activated codes are generally not refunded.
More analysis
Compared with alternatives
Unlike subscription-first apps, STUDY4 relies on a test library and one-off course purchases on the web. Prep is another IELTS and TOEIC prep platform aimed at Vietnamese learners; those focused on speaking and pronunciation may look at ELSA Speak or Speak. STUDY4 states it does not guarantee any particular score.
Screenshots
Plans & pricing
Prices last verified Nov 11, 2026
Học thử / đề thi miễn phí
PersonalFree
The courses page says you can try it free before registering. The homepage and VTC News mention a free test library; the pricing page does not say what the free tier is limited to.
Khóa lẻ (TOEIC, IELTS, HSK, Practical English)
PersonalContact sales
Courses are bought one at a time as online software on the web, priced per course rather than per month. IELTS courses (Fundamentals, Intensive Listening/Reading/Speaking/Writing, General Training Reading/Writing) and HSK courses (HSK 1+2, HSK 3 to HSK 6) cost 799,000 VND each (struck-through 989,000 VND); Complete TOEIC and TOEIC Speaking and Writing cost 1,050,000 VND (struck-through 1,800,000 VND); each Practical English course costs 599,000 VND (struck-through 699,000 VND). The pricing page does not state an access period.
Combo
PersonalContact sales
TOEIC 4-skills and IELTS Intensive 4-skills combos at 1,650,000 VND; IELTS Fundamentals + Intensive at 1,950,000 VND; Practical English and HSK 1-3 combos at 1,050,000 VND each. Struck-through prices on the page are 3,956,000, 4,945,000, 2,097,000 and 1,978,000 VND respectively.
Toàn bộ chương trình học (1 tháng)
Personal₫1,499,000/mo
An in-app purchase in the iOS app at 1,499,000 VND, per the Vietnam App Store listing. The listing does not say whether it renews automatically or exactly which programmes it includes.
- Free plan limits
- A free trial of part of the programmes; the pricing page gives no specifics.
- Free trial
- No free trial
Cancellation & refunds
Per STUDY4's policy, a refund can be requested within 7 days of payment if the service was not delivered, the buyer's devices cannot meet the technical requirements (with an unactivated code), a technical fault attributable to STUDY4 cannot be fixed, or the service does not match what was advertised. Activated codes are generally not refunded. Processing takes up to 15 working days.
Privacy
STUDY4's policy lists collected data as name, date of birth, gender, email, phone number, avatar, IP address, cookies, learning data, submitted work, results and transactions; financial data is classed as sensitive. It says personal data is not currently used for promotional emails and that separate consent would be sought if that changes. The App Store privacy label says the iOS app may use identifiers to track users across other companies' apps and websites. The data controller is A Plus Technology Co., Ltd, under Vietnamese law.
STUDY4 alternatives
6.9/10ELSA Speak
AI-scored English pronunciation and speaking practice
6.8/10Speak
Speaking-first language app with an AI tutor and instant feedback
Controversies & incidents
Issues documented by the press, regulators, courts or the vendor itself. Every item is sourced; unproven claims are labelled as allegations. Last researched: Nov 11, 2026
No significant controversies or incidents found in the sources we checked.
Frequently asked questions
Is STUDY4 free?
Partly. The courses page says you can try it free before registering; full courses must be bought, from 599,000 VND each on the web.
Does STUDY4 have a mobile app?
Yes. The iOS app reached the Vietnam App Store on 5 November 2026; it continues purchased programmes on the same account and syncs progress with the web, and offers a one-month in-app purchase at 1,499,000 VND. No Google Play listing was found in the sources opened.
Does STUDY4 guarantee a score?
No. Its about page says STUDY4 does not guarantee a specific score or certificate from using the service alone.
Can I get a refund?
Yes, within 7 days of payment in the cases the policy lists: service not delivered, incompatible devices, technical fault, content not as advertised. Activated codes are generally not refunded.
Review evidence & sources9
Scores
- Ease of use
- 7.0
- Features
- 7.5
- Value for money
- 7.0
- Performance
- 6.5
- Support
- 6.5
- Privacy & security
- 6.0
Why this score
Personalised roadmaps, full or partial tests and an iOS app, but the interface is Vietnamese-only and there are too few user ratings to confirm usability.
Why this score
Covers IELTS, TOEIC, HSK and TOPIK with flashcards, dictation, statistics and AI grading of pronunciation, speaking and writing, per the official site. AI grading quality has no independent verification.
Why this score
On the web, single courses cost 599,000 to 1,050,000 VND and combos 1,050,000 to 1,950,000 VND, bought once; in the iOS app a one-month pass costs 1,499,000 VND. No access period is stated and high struck-through prices make the discounts hard to assess.
Why this score
No data on stability or speed was found; the score only reflects that no documented incidents were found.
Why this score
Hotline, email, Messenger and Zalo plus a complaints process, with refunds processed within 15 working days. No external feedback on support quality.
Why this score
A detailed policy under Vietnamese personal data law that says data is not currently used for promotional emails. However, the App Store label says the iOS app may use identifiers to track users across other companies' apps. No breach was found, and no independent audit is published.
What users say
- App Store (Việt Nam)5.0/5 · 1
Sources
- Vendor-providedTrang chủ STUDY4Nov 11, 2026
- Vendor-providedDanh sách chương trình học và giá STUDY4Nov 11, 2026
- Vendor-providedGiới thiệu STUDY4Nov 11, 2026
- Vendor-providedChính sách chuyển đổi, hoàn tiền STUDY4Nov 11, 2026
- Vendor-providedChính sách bảo vệ dữ liệu cá nhân STUDY4Nov 11, 2026
- Vendor-providedChính sách sử dụng AI STUDY4Nov 11, 2026
- storeApp Store Việt Nam: STUDY4Nov 11, 2026
- pressTuổi Trẻ (31/01/2026): STUDY4 - Bạn đồng hành chinh phục chứng chỉ ngoại ngữ quốc tếNov 11, 2026
- pressVTC News (02/02/2026): STUDY4 đưa công nghệ hiện đại vào luyện chứng chỉ ngoại ngữ trực tuyếnNov 11, 2026
Specs & compatibility
- Developer
- Công ty TNHH Công nghệ A Plus (STUDY4)
- Headquarters
- Vietnam
- Launched
- 2021
- Category
- Education
Capabilities
- AI features
- Mobile app
Platforms
- Web
- iOS
Interface languages
- Vietnamese
Support
- Phone
- Live chat
- Help center
Change history
- Launch.The STUDY4 app launched on the Vietnam App Store.
- Company.The STUDY4 Foreign Language Center was established in Hanoi by decision of the Phuong Liet ward People's Committee.
- Update.VTC News profiled STUDY4's IELTS Intensive, Complete TOEIC and HSK 1-6 courses, including AI grading for IELTS.
Full change history (5)
- Update.Tuoi Tre published a profile of STUDY4 citing over 2 million users and over 3,000 tests.
- Company.A Plus Technology Co., Ltd, the operator of STUDY4, was issued its enterprise code.
About the author
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