The PSAT is not a test of knowledge, but one that tests reading and judgment speed.
Therefore, rather than simply solving a large number of problems, it is crucial to understand where you wasted time and which question types you repeatedly get stuck on. This app records that for you. It tracks your accuracy and weaknesses across four subjects—Verbal Reasoning, Data Interpretation, Situational Judgment, and Constitutional Law—and its cognitive science-based FSRS algorithm retrieves problems you have already solved just as you are about to forget them.
[Key Features]
1,227 Questions Across 4 Subjects
It contains 340 questions in Verbal Reasoning, 328 in Data Interpretation, 349 in Situational Judgment, and 210 in Constitutional Law. You can solve problems by subject or select and focus on specific question types.
Constitutional Law (4-Option Multiple Choice)
Constitutional Law is included in the Advanced Public Service Aptitude Test. Unlike the other three sections, which use 5-option multiple-choice options, Constitutional Law consists of 25 questions with 4 options. If you do not score over 60 percent of the maximum score, you will fail, no matter how well you perform on the rest of the questions. This app includes the Constitution as a separate subject, allowing you to practice it independently.
Analysis of 39 Past Exams
We have analyzed past exam questions from the 2019–2026 Grade 5 Public Service Exams and the 2021–2025 Grade 7 Public Service Exams by subject area and organized the frequency of questions by question type. You can identify which question types appear repeatedly and focus on tackling those types first.
Detailed Explanations (Free Preview Provided)
To prevent users from simply checking the correct answer number and moving on, each question includes the reasoning behind the answer choice and an explanation of why the incorrect options are incorrect. You can view the detailed explanations via preview even without the Premium plan.
FSRS Smart Review
The app extends the review interval for questions you answer correctly and quickly revisits questions you frequently get wrong. You don't need to create your own review schedule; the app takes care of the questions you need to review today.
Weakness Analysis Heatmap
View the correct answer rates by subject area and question type at a glance. Identify your weaknesses and move directly to solving those types of questions.
Review Box and Memo
Gather incorrect questions and questions to review in one place. You can leave notes on each question, allowing you to review by looking at the reasons why you were confused.
Practical Mock Tests (Organized by Session)
The actual exam is divided into three sessions, with each of the three sections lasting 90 minutes. The mock tests follow the same structure. You practice time management by breaking down the 120 questions across the three sections into sessions, and the system automatically grades your scores by section, whether you fail any section (40 percent per section), and the passing criteria (60 percent of the total score across all sections).
Constitutional Law is taken separately, consisting of 25 questions in 25 minutes. Since the Constitutional Law score does not count towards the total score and is a separate requirement that must exceed 60 percent, it is graded separately rather than mixed with the rest of the exam.
Learning Statistics and Continuous Study
Check your daily problem-solving count, accuracy trends, and days of continuous study. Records that accumulate little by little every day help build consistency.
Exam D-Day
Check the upcoming PSAT exam date directly on the homepage. Exam Preparation Checklist
We have organized the required items, entry times, and things to check at the test center.
Light or Dark Theme
You can follow your system settings or choose your own, ensuring comfortable viewing even when studying late at night.
Offline Learning
You can solve problems even without an internet connection. It remains seamless even on the subway or while on the go.
[Content Guide]
This app does not reproduce past exam questions verbatim. This is because the copyright for past questions belongs to the administering body. Instead, we have analyzed the 39 publicly available past exam sessions to create study questions tailored to the format and difficulty level of the actual exam. The questions are composed of types with a high probability of appearing on the exam, and we do not restore or duplicate past questions.
This app is an independent private learning tool designed to assist with PSAT (Public Service Aptitude Test) preparation and does not affiliate with or represent any government or public institution, such as the Ministry of Personnel Management.
[Recommended for]
Students preparing for the Level 5 Civil Service Examination or the 1st Round of the Diplomat Candidate Examination
Students preparing for the 1st Round of the National Civil Service Level 7 Examination
Those who need to maintain their PSAT skills while studying their major subjects
Those who review past questions multiple times but cannot identify their weaknesses
Those who want to continue solving problems, even briefly, during their commute
Premium Features: Unlimited access to all 1,227 questions, Unlimited detailed explanations, FSRS Smart Review, Weakness Analysis Heatmap, Question Frequency Analysis, Practice Mock Tests, Ad Removal
[Terms and Privacy Policy]
Terms of Use: https://dayprep.co/psat/terms
Privacy Policy: https://dayprep.co/psat/privacy
(c) 2026 DAYLAB, contact@daylab.dev
1,227 questions across 4 subjects: Verbal Reasoning, Data Interpretation, Situational Judgment, and Constitutional Law. Prepare for the first round by solving problems by type and reviewing incorrect answers.