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Academic Word List - quiz, flashcard and game icon
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+27

Bui Hoai Trang

For english language learners, IELTS/TOEFL test-takers, and students seeking to improve academic writing and vocabulary.

30apps1.1(10.2K)ReferenceEducation

Snapshot

Who is Bui Hoai Trang?

Providing specialized reference tools for English language learners and academic writers. Helping users master vocabulary, idioms, and technical syntax.

Target audience

English language learnersIELTS/TOEFL test-takersStudents seeking to improve academic writing

Top rival

Nelly Latypova

Other rivals

Portfolio

Free 4
30
apps
Reference28
Education2

Last updated

Vocabulary Builder: thesaurus,

v7.2

7mo ago

Active

Publisher DNA

What defines Bui Hoai Trang?

Publisher DNA

Primary focus

Reference and educational tools for language learning

Scale

studio

Target audience

English language learners, IELTS/TOEFL test-takers, and students seeking to improve academic writing and vocabulary.

Signature Patterns

  • •Heavy reliance on the Reference category for app distribution
  • •Monetization primarily through free-to-access models
  • •Content-heavy utility design focused on flashcards, quizzes, and dictionaries
  • •Targeting specific academic and linguistic sub-niches like IELTS preparation and etymology
Active

Portfolio momentum

Released 6 updates across 30 apps in the last 6 months, with a significant portion of the portfolio remaining in a maintenance state.

Last release 3d agoActive apps 8Abandoned 17

Rivals

Who does Bui Hoai Trang compete with?

The rivals identified

Nemeses(3)

Innnovative-Software

known forEnglish Bangla Dictionary

1 app4.5Reference

This app dominates the reference category with massive scale, directly competing for the same English-learning user base that seeks offline dictionary utility.

Monkey Taps

known forVocabulary - Learn words daily

1 app4.8Education

Both apps compete for English language learners by providing vocabulary acquisition tools, directly overlapping in the educational utility category.

Smertrios

known forEnglish language: Learn & Play

1 app4.6Reference

Both apps target English language learners seeking idiom mastery, but the rival captures users through a free, gamified interface that contrasts with the paid, reference-based model of Common English Idioms.

Contenders(21)

Nelly Latypova

known forLearn English: Prepositions

1 app4.4EducationReference

Learn English: Prepositions serves the same academic test-prep audience by providing highly focused, drill-down grammar exercises.

Aidan Potts

known forEnglish Idioms Illustrated

1 app3.6Reference

Both apps target English language learners seeking to master idiomatic expressions, creating direct competition for the same user base.

AKSHI

known forIdioms & Phrases (English)

1 app4.4Reference

Both apps target language learners seeking idiom mastery, with the rival capturing price-sensitive users through a free, multi-language model that overlaps directly with the source app's English-focused audience.

Batuhan Bayar

known forAtasözleri ve Deyimler Sözlüğü

3 apps5.0Reference

Directly overlaps with our focus on word combinations by specializing in idioms and proverbs for language learners.

Bilal Batur

known forWise - English Vocabulary

1 app5.0Education

Both apps target English language learners using flashcards and quizzes, creating direct competition for users seeking vocabulary improvement tools.

Dharmesh Malaviya

known forIELTS Vocabulary practice

1 app4.0Education

Both apps target students preparing for English-language proficiency exams or academic environments, creating direct competition for study time and user attention.

Dynamic Apps

known forWordPal - Vocabulary Builder

1 app4.7Education

Both apps target English vocabulary acquisition, competing for the same user base of students and learners despite differing content focuses.

Hoang Pham

known forSpeak English Idioms Phrases

1 app4.5Reference

Both apps target English language learners seeking to master idiomatic expressions, competing directly for users searching for vocabulary reference tools.

Kantaben Gorasiya

known forIdioms and Phrases - English

1 app4.7Reference

Both apps target English language learners seeking to master idiomatic expressions, competing directly for users searching for study tools in the same category.

Labian Labs

known forVoca: IELTS Vocabulary 2026

1 appEducation

Both apps target students seeking English vocabulary acquisition for academic or proficiency testing, competing for the same user base focused on standardized language improvement.

Learzing Co

known forIdioms Land: Learn English Idi

1 appReference

Both apps target English language learners seeking to master idiomatic expressions, competing directly for user attention through structured idiom libraries.

Magoosh

known forGRE Vocabulary Flashcards

3 apps4.8Education

Magoosh serves the same GRE-focused academic audience with a high-authority, expert-curated wordlist that functions as a free acquisition funnel.

Nguyen Thi Hoai Thu

known forEnglish Japanese Offline

1 app5.0Reference

Targets the same offline-first language learning demographic with a focus on corpus-based content and frequency analysis.

Nguyen Thi Thanh Huyen

known forEnglish idioms in use

1 app4.7Reference

Both apps target English language learners seeking to master idiomatic expressions, competing directly for the same user base through structured learning content.

Positive Mindset sp. z o. o.

known forMyVocab - Learn new words

1 app4.7Education

Both apps compete for the same user time-share in self-directed English vocabulary study, targeting individuals looking to improve their communication skills for school or work.

Reev Tech

known forEnglish Idioms and Slangs

1 app4.9Reference

Both apps target English language learners seeking to master idiomatic expressions, with significant overlap in content volume and structured learning objectives.

Renkara Media Group

known forExam Vocabulary Builder

1 app3.3Education

Both applications target university students and test-takers by providing flashcard-based tools for mastering academic vocabulary.

Thanh Vu Truong

known forIELTS Vocabulary 4000 Academic

3 apps5.0Education

Both applications target students preparing for academic English environments by providing curated vocabulary lists and quiz-based practice tools.

Velastra

known forLearn English: Phrase Ace

1 app4.2Reference

Both apps target English language learners seeking to master idiomatic expressions, competing for the same user base through structured learning content.

Xuan Trung Truong

known forEnglish Vocabulary in Use

1 app5.0Education

Both apps target English language learners seeking vocabulary acquisition, creating direct competition for users choosing between specialized academic study and general lexicon expansion.

佩佩 伍

known forEnglish Phrase Book Learn

1 app4.7Reference

Both apps target English language learners through a paid model, competing directly for users seeking to improve their proficiency in English expressions and phrases.

Same space(18)

ABA English

known forABA English - Learn English

1 app4.7Education

ABA English serves the same English language learning demographic by offering a comprehensive, video-based immersion method.

Anki Software

known forAnkiMobile Flashcards

1 app4.1Education

AnkiMobile provides a professional-grade flashcard system for the same academic audience, focusing on long-term retention through advanced scheduling.

cabuu

known forcabuu - Learn vocabulary

2 apps3.9Education

cabuu targets secondary students needing curriculum-aligned study tools, using OCR scanning to remove manual data entry friction.

Daniel Reicher

known forVocabulary Flashcards - Vocabu

1 app4.8Education

Vocabu targets language learners by offering personalized vocabulary collections and multi-format import capabilities.

Dmitry Zhuk

known forIdioms and Slang Dictionary

1 app4.6Reference

This app serves the same English language learner audience but expands the scope to include slang and colloquialisms alongside idioms.

DuoCards

known forDuoCards - Vocabulary Builder

1 app4.6Education

DuoCards serves the same vocabulary-focused user base by enabling content-based learning from external media like subtitles and articles.

EpopSoft

known forEpop: Learn Real-Life English

2 apps4.7Education

Epop targets the same English language learner audience by using gamified progression and AI-tailored exercises to maintain daily engagement.

FB PUBLISHING

known forMy Vocabulary - Flashcards

1 app3.0Education

My Vocabulary targets language learners by providing a manual, user-defined flashcard system for custom vocabulary management.

LW Group

known for默書啦喂 - AI 默書練習助手

1 app3.0Reference

Shares the educational space by using AI to assist with language practice and dictation exercises.

Merve islak

known forEnglish - Learn Basic English

1 app5.0Education

English - Learn Basic English serves the same beginner demographic in low-connectivity environments with a static, offline-first utility.

Nexus Kairos

known forNuva - English Tutor

1 app5.0Reference

Directly competes for the English-learning audience by offering AI-driven conversation practice and feedback.

Oibori

known forTOPIK Writing - Easy6

2 apps5.0Reference

Competes for the same language-learning audience by providing specialized mobile tutoring for writing proficiency.

Ollopa

known fordeft - vocabulary & flashcards

1 app4.9Education

deft targets vocabulary enthusiasts by providing a privacy-focused, offline-first dictionary and flashcard tool.

phase6.de: Vokabeln zum Schulbuch

known forLearn vocabulary with phase6

1 app0.0Education

phase6 targets the academic student segment by aligning vocabulary training with specific school textbooks used in German-speaking regions.

Quizlet

known forQuizlet: More than Flashcards

1 app4.8Education

Quizlet competes for the same university student demographic by offering a broader study platform with AI-powered note generation and massive user-generated content libraries.

Softwares

known forIdioms English Dictionary

1 app4.5Reference

This app targets the same learner demographic by providing an offline reference tool for idioms and phrases.

Thuy Duong

known forGRE word list master

1 app0.0Education

GRE Word List Master targets the same GRE-prep audience by combining extensive word lists with AI-powered linguistic analysis.

Zero Billion

known forYapper Live

1 app5.0Reference

Targets the same language-learning demographic but focuses on real-time voice interaction and persona-based coaching.

New entrants(3)

Anton Sorokin

known forArticulate: Speech Trainer

1 app0.0Reference

Enters the language learning space with a focus on pronunciation, competing for the same user's time and attention.

CoachAI

known forBLCC Conversation Coach

1 app0.0Reference

A new entrant in the education category that uses AI to facilitate conversational learning.

IRENEE AJENEZA

known forLanguage Vocabulary Flashcards

1 app0.0Education

Language Vocabulary Flashcards targets the same language learning audience by allowing users to create cards using their own voice recordings.

The Analyst's Read

The bottom line on Bui Hoai Trang

Bottom line

The publisher operates a stable, low-maintenance portfolio of reference tools that capture consistent interest from the language-learning community. Their strategy of building granular, single-purpose apps provides a reliable, if modest, footprint in the education and reference space.

Frequently asked questions

How many apps does Bui Hoai Trang publish?
Bui Hoai Trang has 30 apps tracked by Marlvel, primarily in the Reference category.
What kind of apps does Bui Hoai Trang make?
Bui Hoai Trang's portfolio is concentrated in Reference and Education, with an average rating of 1.1/5 across rated apps.
What is Bui Hoai Trang's top app?
By review volume across the portfolio, Vocabulary Builder: thesaurus, is Bui Hoai Trang's best-known app tracked by Marlvel.

What fed this analysis

Apps analyzed:
30
With full intel:
0
With overview:
30
Website scraped:
yes
Social presence:
no

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Bui Hoai Trang, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “Bui Hoai Trang intelligence.” Updated 2026-05-06. https://marlvel.ai/publishers/bui-hoai-trang

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Data licensed under CC-BY-NC 4.0