# 산안산기 – 산업안전산업기사 필기 대비 > Prepare for the Industrial Safety Technician written exam with CBT mock exams, incorrect answer notes, weakness analysis, and FSRS smart review. Canonical page: [https://chrome-stats.com/d/dev.daylab.safesangi](https://chrome-stats.com/d/dev.daylab.safesangi) ## Overview - **ID:** `dev.daylab.safesangi` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** DayLab - **Category:** EDUCATION - **Downloads:** 34 - **Version:** 1.0.0 - **Last updated:** 2026-07-27 - **First published:** 2026-07-27 - **Publisher country:** KR - **Size:** 106 MB - **Data as of:** 2026-09-11 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=dev.daylab.safesangi) - **Website:** [https://dayprep.co/safesangi](https://dayprep.co/safesangi) - **Privacy policy:** [https://dayprep.co/safesangi/privacy](https://dayprep.co/safesangi/privacy) ## Description For the Industrial Safety Technician written exam, passing depends more on how you review than on how many questions you solve.

Sanansanki is not an app that merely increases the number of practice questions. It focuses on pinpointing your current weaknesses and retrieving questions you have already solved just before you forget them. Because the cognitive science-based FSRS algorithm determines the optimal review time for each question, you can continue solving today's study questions without having to create a separate review plan.

[Key Features]

Over 1,400 Questions, Covering the Entire Range of 5 Subjects

Covering everything from Industrial Accident Prevention and Safety & Health Education, Ergonomics and Risk Assessment & Management, Machinery, Equipment & Facility Safety Management, Electrical & Chemical Facility Safety Management, and Construction Safety Management. It was developed in-house to reflect the Q-net exam standards.

Detailed Explanations for Each Question

You can immediately check the correct answer and explanation once you submit your answers. By viewing the explanation and solutions for each option together, you can reconfirm concepts for questions you answered correctly and compare why confusing choices differ. Various Solving Modes

You can select the range you want to solve by subject and unit. You can start with unsolved problems or choose weak units for intensive study, and check your progress and learning status by unit.

Start Diagnosis

Check your current level with diagnostic questions for 5 subjects. Based on the diagnosis results and subsequent study records, it organizes the subjects and problems to study first.

FSRS Smart Review

The review interval for questions you remember well is extended, while frequently missed or ambiguous questions are shown again earlier. You don't have to calculate your review schedule manually; the app gathers the questions you need to review today.

Review Notifications

Notifies you of today's study and review at the set time. You can maintain your study flow with daily study reminders and review time notifications.

Weakness Analysis Heatmap

Check the correct answer rate by subject and unit at a glance. Tapping a weak area takes you directly to the problem solutions for that unit, and you can also compare their frequency of appearance.

Review Box
Gathers incorrect answers, questions you solved ambiguously, and questions to review in one place. Select by subject, number of incorrect answers, number of attempts, and whether notes were taken, and sort by desired criteria such as recent incorrect answers and repeated incorrect answers.

**Question Notes and Replay**
You can leave your own notes for each question and save them for later review. You can review by viewing the reasons for your confusion and your notes alongside the questions.

**Practical Mock Exams**
Solve 100 questions across 5 subjects, identical to the actual written exam format, within a time limit. Check your total score, scores by subject, and whether you failed any subject. After submission, you can review the questions you got wrong and the explanations.

**Pass Probability and Study Recommendations**
It shows changes in your chances of passing based on your cumulative problem-solving records and subject-specific achievements. It recommends questions to solve next, reflecting your current weaknesses and review status.

**Study Plan and Today's Goal**
Create a study plan based on the selected exam session and check the questions to solve and review today. Your goal achievement status and consecutive study days are also recorded.

**Learning Statistics**
Check the number of solutions, correct answer rate, study time, mock exam records, and progress by subject. You can view the days you have studied at a glance using the "Date-based Learning Grass" feature.

Exam Schedule D-Day

Select the session you are preparing for among the 2026 Industrial Safety Technician Written Exam Sessions 1, 2, and 3. On the Home screen, you can check the D-day based on the first day of the written exam for that session, while in Settings, you can view the exact exam period.

Light, Dark Themes, and Font Size

You can customize the theme to match your system settings or select Light or Dark themes directly. You can also adjust the font size to your desired level within the app.

Tablet Support

You can study with a layout optimized for screen size on tablets as well as mobile phones.

Device Synchronization

Logging in saves your study records and review schedules, allowing you to continue studying on other devices. You can also start immediately as a guest without logging in.

Reporting Question Errors and Inquiries

If you find content that requires verification while solving problems, you can report question errors within the app. You can also check your inquiry history and responses within the app.

[Content Guide]

The Industrial Safety Technician app does not include past exam questions verbatim. All questions and explanations are self-produced educational content based on the Q-net examination standards. We do not restore or reproduce actual exam questions.

This app is an independent private learning tool designed to assist with studying for the Industrial Safety Technician written exam. It is not affiliated with or represents any government or public institution, such as the Human Resources Development Service of Korea (HRDK) or Q-Net.

[Recommended for]

Those preparing for the Industrial Safety Technician written exam for the first time

Office workers and students aiming to pass the written exam through self-study

Those who found managing incorrect answers and planning reviews cumbersome

Those who want to study during their commute and spare time

Those who want to identify weaknesses by subject and solve the problems they need first

© 2026 DAYLAB

Inquiries: contact@daylab.dev

[Terms and Policies]

Terms of Use: https://dayprep.co/safesangi/terms

Privacy Policy: https://dayprep.co/safesangi/privacy ## Rankings - #2,398,779 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.CAMERA` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_APP_BADGE` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.RECORD_AUDIO` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.USE_BIOMETRIC` - `android.permission.USE_FINGERPRINT` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.anddoes.launcher.permission.UPDATE_COUNT` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.htc.launcher.permission.READ_SETTINGS` - `com.htc.launcher.permission.UPDATE_SHORTCUT` - `com.huawei.android.launcher.permission.CHANGE_BADGE` - `com.huawei.android.launcher.permission.READ_SETTINGS` - `com.huawei.android.launcher.permission.WRITE_SETTINGS` - `com.majeur.launcher.permission.UPDATE_BADGE` - `com.oppo.launcher.permission.READ_SETTINGS` - `com.oppo.launcher.permission.WRITE_SETTINGS` - `com.sec.android.provider.badge.permission.READ` - `com.sec.android.provider.badge.permission.WRITE` - `com.sonyericsson.home.permission.BROADCAST_BADGE` - `com.sonymobile.home.permission.PROVIDER_INSERT_BADGE` - `dev.daylab.safesangi.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `me.everything.badger.permission.BADGE_COUNT_READ` - `me.everything.badger.permission.BADGE_COUNT_WRITE` ## Similar extensions and apps - [산안기 - 산업안전기사 필기 문제집 개념 해설 문제풀이](https://chrome-stats.com/d/dev.daylab.safekisa) — 214 users - [산업안전기사 필기 CBT｜시나크](https://chrome-stats.com/d/com.sinak.safety_engineer) — 2,780 users - [건안기 - 건설안전기사 필기 시험 대비](https://chrome-stats.com/d/dev.daylab.gunsafe) — 24 users - [원펀: 산업안전산업기사 기출, 음성듣기, 해설](https://chrome-stats.com/d/com.onepunch.indsafetyind) — 8 users - [산업안전기사-기출문제,음성듣기,해설강의](https://chrome-stats.com/d/com.kanomsoft.sanupjongmin) — 588 users - [전기산업기사 필기 CBT｜시나크](https://chrome-stats.com/d/com.sinak.electric_industrial_engineer) — 300 users - [사자산기 필기 - 사무자동화산업기사 필기 시험 대비](https://chrome-stats.com/d/dev.daylab.samujadonghwa) — 7 users - [산업위생관리기사 필기 CBT 모의고사 문제은행 오답노트](https://chrome-stats.com/d/dev.daylab.saneopwisaeng) — 12 users - [산업안전지도사 기출문제 합격노트](https://chrome-stats.com/d/com.mkj6223.sanan_quiz) — 2 users - [합격 산업안전기사 기출문제](https://chrome-stats.com/d/com.edurocket.safetyE) — 4,709 users - [Industrial Safety Engineer](https://chrome-stats.com/d/kr.passrun.safetyeng) — 1 users - [산림 기능사 필기시험: 기출문제 & 오답노트](https://chrome-stats.com/d/kr.eumplus.dd.sanlim) — 789 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/dev.daylab.safesangi)