# 틈틈봇-위험물기능장 (잠금화면 기출문제 자동학습)+알람 > It is a study app for past questions to prepare for certification. Canonical page: [https://chrome-stats.com/d/com.tmtmapp.crafthazardousmaterial](https://chrome-stats.com/d/com.tmtmapp.crafthazardousmaterial) ## Overview - **ID:** `com.tmtmapp.crafthazardousmaterial` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** 틈틈봇 (잠금화면에서 틈틈이, 자동으로 시험공부) - **Category:** EDUCATION - **Downloads:** 2,563 - **Version:** 1.8.7 - **Last updated:** 2026-08-19 - **First published:** 2024-01-17 - **Publisher country:** KR - **Size:** 189 MB - **Data as of:** 2026-09-14 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.tmtmapp.crafthazardousmaterial) - **Website:** [https://www.examscreen.com/](https://www.examscreen.com/) - **Privacy policy:** [https://tmtmapp.com/privacy](https://tmtmapp.com/privacy) ## Description ■1. Study automatically!

What if you could automatically study one previous Dangerous Materials Technician Exam question every time you turned on your phone?
How often do you turn on your phone each day?

You check KakaoTalk, Instagram, the time, and even unconsciously flick your phone open. But if a question popped up every time you opened your phone, wouldn't you study a lot without realizing it?

You need to study hard before an important exam. But even if you have a study app installed on your phone, it's a hassle to go back to the app and look at it again. Often, I even forget I'm studying the moment I turn on my phone.

Just turn on your phone and you'll automatically see the Dangerous Materials Technician Exam flashcards and previous exam questions. If solving the questions is too much of a hassle, just read through them once and don't worry about getting them wrong. Even if you just read the clear explanations once and move on, it's incredibly helpful.

■2. A vast collection of past exam questions + the latest questions!

All past exam questions for all subjects,

and all future exams are updated without fail, so this app is all you need to master past exam questions.
This is the most comprehensive study app for the Hazardous Materials Technician exam, unlike anything you've seen before, so trust us and get it!

■3. Everything's free
Yes! It's currently completely free.

■4. Unit-by-Unit Focused Study Functions
From question 1 to the end...

Studying the old-fashioned way is very inefficient.

We provide functions that allow you to view the exams by unit and question type,
so you can focus on your weak areas.

■5. Essential study features only experienced students know!
"What did I get wrong? "I know this question, but why does it keep coming up..."
"I want to see only the confusing questions..."
"Stop worrying about these things.
Create an app that's perfect for you with the error note and problem exclusion features.

If you get a question wrong, it's automatically recorded in your error note.
There's even a feature that lets you completely ignore a question you already know,
so you never have to look at it again.
You can bookmark questions you want to review later
and view only that part on your lock screen!

■6. Clear and concise explanations, filled with care
For those of you who study briefly on your lock screen,
we offer the perfect explanations.

Our test-takers have put in the effort
to provide concise and clear explanations of correct and incorrect answers.

We believe this will be much more helpful than lengthy, tedious explanations.

■7. Various features to manage your mental and physical health
🎯 Goal reminder feature to keep you on track
📅 D-day reminder to remind you of the precious time remaining
📜 Quotes to motivate you
🌧️ Weather feature to help you manage your condition, etc.

💡 Special features of Tteumtteumbot
You can automatically view past exam questions on your lock screen, just like an alarm.
So, Tteumtteumbot will remind you to solve exam questions whenever you have a moment in your daily life!

Trust Tteumtteumbot and solve past exam questions to pass your certification exam easily💛

--------------------------------


We put a lot of effort into creating this app.
The more people use it by recommending it to others, the more we can improve its features and add more content.
I would really appreciate it if you could recommend me on KakaoTalk, Instagram, etc.
I would also greatly appreciate a +1 on Google Play.
I would also appreciate a positive review, as it would encourage me to do better.

* This app is designed for studying on the lock screen.

Copyrightⓒ2022 Ttumtbot. All rights reserved.
* All copyrights in this app belong to Ttumtbot. Copyright infringement may result in legal action.
* The exclusive purpose of this app is to study learning content on the lock screen.
 ## Rankings - #883,209 — Overall ## Permissions and access ### Permissions - `READ_PHONE_NUMBERS` - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.CAMERA` - `android.permission.CHANGE_WIFI_STATE` - `android.permission.DISABLE_KEYGUARD` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_SPECIAL_USE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_BASIC_PHONE_STATE` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.READ_PHONE_STATE` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.REQUEST_COMPANION_START_FOREGROUND_SERVICES_FROM_BACKGROUND` - `android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.USE_FULL_SCREEN_INTENT` - `android.permission.USE_FULL_SCREEN_INTENT.action.SHOW_ALARMS` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.amazon.privacypass.ATTEST` - `com.coupang.mobile` - `com.coupang.mobile.offsite` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.google.android.providers.gsf.permission.READ_GSERVICES` - `com.huawei.permission.external_app_settings.USE_COMPONENT` - `com.tmtmapp.crafthazardousmaterial.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [틈틈봇-위험물산업기사 (잠금화면 자동 학습)+알람](https://chrome-stats.com/d/com.tmtmapp.indenghazard) — 13,754 users - [틈틈봇-건설안전산업기사 (잠금화면에서 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.indengconsafety) — 2,612 users - [틈틈봇-정보처리기능사 (잠금화면 자동 시험공부)+알람](https://chrome-stats.com/d/com.tmtmapp.craftinfopro) — 1,764 users - [틈틈봇-간호조무사 (잠금화면 기출문제 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.lpn) — 8,658 users - [틈틈봇-산업안전산업기사 (잠금화면에서 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.indengsafety) — 47,590 users - [틈틈봇-산업안전기사 (잠금화면에서 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.engindsafety) — 132,495 users - [틈틈봇-화재감식평가산업기사 (잠금화면 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.fireevaluationindeng) — 197 users - [틈틈봇-자동차정비기능사 (잠금화면에서 자동 학습)+알람](https://chrome-stats.com/d/com.tmtmapp.craftmainmotor) — 6,342 users - [틈틈봇-건설안전기사 (잠금화면 기출문제 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.engsconsafety) — 44,864 users - [틈틈봇-자동차정비산업기사 (잠금화면에서 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.indengmainmotor) — 2,359 users - [틈틈봇-산업위생관리기사 (잠금화면에서 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.engindhygiene) — 3,221 users - [틈틈봇-자동차차체수리기능사 (잠금화면 자동학습)+알람](https://chrome-stats.com/d/com.tmtmapp.craftrepairmotor) — 922 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.tmtmapp.crafthazardousmaterial)