수학대왕 vs Welding Written
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
수학대왕
This app offers a comprehensive solution for math studies, providing AI-driven analysis, practice problems, and concise video lectures. It helps users improve their scores by identifying weak areas and offering tailored learning paths. Features include personalized problem sets, original content, and progress tracking.
- AI-driven skill analysis
- Personalized problem sets
- Original practice problems
- Short, efficient video lectures
- Progress tracking and reports
- Daily scholarship system
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수학, 어떻게 시작해야 할지 고민인가요? 공부를 해도 성적이 오르지 않아 막막하신가요? 수학 공부에 대한 여러분의 모든 고민, 수학대왕이 해결해 드립니다! 문제부터 강의, 실력 진단과 분석까지 다~ 되는 수학대왕으로 성적을 올려보세요. 성적 상승, 수학대왕과 함께라면 가능합니다. ■수학 공부, 계획 세우기가 어렵다면, 수학대왕 AI 분석부터 받아보세요. AI가 체계적으로 분석한 내 실력에 맞는 부분부터 공부하고, 차근차근 다음 레벨로 나아가요! ■어떤 문제집을 얼마나 풀어야 할지 모르겠다면, 여러분에게 필요한 모든 문제, 수학대왕에 다 있어요. 기출 문제부터 고난도 문제, 틀린 것과 유사한 문제까지! 문제집 고민하지 말고, 수학대왕에 들어오세요. 특히 수학대왕이 자체제작한 ORIGINAL문제는 다른 곳에서 절대 만나볼 수 없는 퀄리티를 자랑해요! ■길고 지루한 인강에 지쳤다면, 수학대왕만의 짧은 핵심 강의로 재밌고, 효율적으로 공부하세요! 문제마다 제공되는 해설강의는 물론 알찬 개념 강의까지, 내 실력과 공부계획에 맞게 강의를 들으세요. ■잘 공부하고 있는 게 맞나? 불안하다면, 수학대왕 AI가 분석한 정확한 내 실력 리포트를 확인해 보세요! 내 실력이 전국 상위 몇 %인지, 예상 점수/예상 합격 대학은 어디인지 다 알려드려요. ■아직도 시작하기 망설여지시나요? 걱정 마세요, 수학대왕만의 매일 장학금 시스템으로 매일 공부할 수 있는 원동력을 만들어 드릴게요! 수학대왕에서는 서비스 제공을 위해 아래의 접근 권한을 필요로 합니다. [필수 접근 권한] · 없음 [선택 접근 권한] · 연락처 : 연락처를 통한 친구 초대 및 추가에 사용 · 알림 : 친구 요청 및 학습 알림에 사용 · 앱 추적 투명성 : 광고 제공 또는 데이터 브로커와의 공유를 목적에 사용 · 카메라 : 사진 업로드를 위한 촬영에 사용 · 사진 : 사진 업로드를 위해 사용 ※ 선택 권한은 허용하지 않아도 서비스를 이용할 수 있으나, 일부 기능 사용에 제한이 있을 수 있습니다.
Welding Written
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The Craftsman Welding written exam, in the palm of your hand. Welding is a core course at Korea's government-funded vocational academies. The Craftsman Welding (용접기능사) and Craftsman Special Welding (특수용접기능사) written exams share the same format, so this app covers both. 330 questions follow six units of the official HRD Korea exam standard, every one with a full explanation. Work through them in order and you will be ready — no sign-up, no internet connection required. ■ CBT mock exam, just like the real thing · 60 questions drawn automatically in the syllabus proportions (60-minute timer) · Move between questions on an OMR answer sheet like the real exam · Instant pass/fail against the 60-out-of-100 standard (one subject, no cutoff) · Leave mid-exam and pick up exactly where you left off · Five full rounds with no repeats — new questions every time ■ Wrong-answer notes that keep only what you got wrong · Questions you miss are collected automatically · Get one right three times running and it graduates off the list · Add your own memo to any question · Filter by unit, sort by how often you missed it ■ Study unit by unit · Welding basics & procedures / Shielded metal arc welding / Gas welding & cutting Special welding (CO2, TIG, MIG, submerged arc) / Welding materials / Drawing reading · Broken into 30 sub-topics so you can study in short sittings · The special welding unit is the largest (70 questions) for Special Welding candidates · Pick an answer and see the correct one with its explanation straight away ■ Statistics that show you your weak spots · Weak units identified automatically from your accuracy per unit · Graph of your mock exam scores over time · Study volume for the last two weeks, and your daily streak · "Weak-point drill" gathers only the questions you get wrong most ■ And more · Random mock exam — choose the range and the number of questions · Bookmarks — collect the questions that keep tripping you up · Search — keyword search across questions, options and explanations · Dark mode and adjustable text size · Shuffle questions and options so you don't memorise positions ■ Multilingual, for foreign workers and trainees · 한국어 / English / Tiếng Việt / ไทย / Bahasa Indonesia / 中文 · All 330 questions translated into five languages · The real exam is written in Korean, so a side-by-side mode shows the Korean original underneath the translation · Built with E-9 workers and vocational trainees learning welding in Korea in mind ■ Academy referral Once you pass the written exam and need practical training (SMAW, CO2, TIG), send an enquiry from inside the app. We will help you find a training provider, including government-funded courses, that fits your area, schedule and budget. · Your study records stay on your device and are never sent anywhere. · The Craftsman Welding and Special Welding written exams are administered by CBT, so the actual questions are not released publicly. The questions in this app are practice questions written from the official exam standard and may differ from the real exam. Check q-net.or.kr for official exam dates and eligibility. · Contact: seohcz1@gmail.com
Screenshots
Verdict
The clearest difference is update cadence: Welding Written at every 3 days against 수학대왕's monthly. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
수학대왕 ships an update monthly, Welding Written every 3 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.
| Parameter | 수학대왕 | Welding Written |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (36 ratings) — better | — |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 36 — better | — |
| Update frequency | Monthly | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 86 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Turing Co.,Ltd. | hyuncheol seo |
In-app purchases
수학대왕
No in-app purchases
Welding Written
No in-app purchases









