diff --git a/.gitignore b/.gitignore
index 975add5..471a599 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,3 +68,5 @@ JLPTVoca/SwiftData.md
 JLPTVoca/WordStability.md
 
 .github/.DS_Store
+
+JLPTVoca/.DS_Store
diff --git a/JLPTVoca/.DS_Store b/JLPTVoca/.DS_Store
index d811d2f..7d1e7eb 100644
Binary files a/JLPTVoca/.DS_Store and b/JLPTVoca/.DS_Store differ
diff --git a/JLPTVoca/JLPTVoca.xcodeproj/project.pbxproj b/JLPTVoca/JLPTVoca.xcodeproj/project.pbxproj
index 0afd28b..3c87686 100644
--- a/JLPTVoca/JLPTVoca.xcodeproj/project.pbxproj
+++ b/JLPTVoca/JLPTVoca.xcodeproj/project.pbxproj
@@ -6,8 +6,19 @@
 	objectVersion = 77;
 	objects = {
 
+/* Begin PBXContainerItemProxy section */
+		216132B72E71D3C300DE17B7 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 214FEB582E5E320300C87957 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 214FEB5F2E5E320300C87957;
+			remoteInfo = JLPTVoca;
+		};
+/* End PBXContainerItemProxy section */
+
 /* Begin PBXFileReference section */
 		214FEB602E5E320300C87957 /* JLPTVoca.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = JLPTVoca.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		216132B32E71D3C300DE17B7 /* JLPTVocaUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = JLPTVocaUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFileSystemSynchronizedRootGroup section */
@@ -16,6 +27,11 @@
 			path = JLPTVoca;
 			sourceTree = "<group>";
 		};
+		216132B42E71D3C300DE17B7 /* JLPTVocaUITests */ = {
+			isa = PBXFileSystemSynchronizedRootGroup;
+			path = JLPTVocaUITests;
+			sourceTree = "<group>";
+		};
 /* End PBXFileSystemSynchronizedRootGroup section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -26,6 +42,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		216132B02E71D3C300DE17B7 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
@@ -33,6 +56,7 @@
 			isa = PBXGroup;
 			children = (
 				214FEB622E5E320300C87957 /* JLPTVoca */,
+				216132B42E71D3C300DE17B7 /* JLPTVocaUITests */,
 				214FEB612E5E320300C87957 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -41,6 +65,7 @@
 			isa = PBXGroup;
 			children = (
 				214FEB602E5E320300C87957 /* JLPTVoca.app */,
+				216132B32E71D3C300DE17B7 /* JLPTVocaUITests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -70,6 +95,29 @@
 			productReference = 214FEB602E5E320300C87957 /* JLPTVoca.app */;
 			productType = "com.apple.product-type.application";
 		};
+		216132B22E71D3C300DE17B7 /* JLPTVocaUITests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 216132B92E71D3C300DE17B7 /* Build configuration list for PBXNativeTarget "JLPTVocaUITests" */;
+			buildPhases = (
+				216132AF2E71D3C300DE17B7 /* Sources */,
+				216132B02E71D3C300DE17B7 /* Frameworks */,
+				216132B12E71D3C300DE17B7 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				216132B82E71D3C300DE17B7 /* PBXTargetDependency */,
+			);
+			fileSystemSynchronizedGroups = (
+				216132B42E71D3C300DE17B7 /* JLPTVocaUITests */,
+			);
+			name = JLPTVocaUITests;
+			packageProductDependencies = (
+			);
+			productName = JLPTVocaUITests;
+			productReference = 216132B32E71D3C300DE17B7 /* JLPTVocaUITests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -83,6 +131,10 @@
 					214FEB5F2E5E320300C87957 = {
 						CreatedOnToolsVersion = 16.4;
 					};
+					216132B22E71D3C300DE17B7 = {
+						CreatedOnToolsVersion = 16.4;
+						TestTargetID = 214FEB5F2E5E320300C87957;
+					};
 				};
 			};
 			buildConfigurationList = 214FEB5B2E5E320300C87957 /* Build configuration list for PBXProject "JLPTVoca" */;
@@ -100,6 +152,7 @@
 			projectRoot = "";
 			targets = (
 				214FEB5F2E5E320300C87957 /* JLPTVoca */,
+				216132B22E71D3C300DE17B7 /* JLPTVocaUITests */,
 			);
 		};
 /* End PBXProject section */
@@ -112,6 +165,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		216132B12E71D3C300DE17B7 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -122,8 +182,23 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		216132AF2E71D3C300DE17B7 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXSourcesBuildPhase section */
 
+/* Begin PBXTargetDependency section */
+		216132B82E71D3C300DE17B7 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 214FEB5F2E5E320300C87957 /* JLPTVoca */;
+			targetProxy = 216132B72E71D3C300DE17B7 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
 /* Begin XCBuildConfiguration section */
 		214FEB692E5E320400C87957 /* Debug */ = {
 			isa = XCBuildConfiguration;
@@ -302,6 +377,42 @@
 			};
 			name = Release;
 		};
+		216132BA2E71D3C300DE17B7 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = 3HYFT54PK2;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.JLPTVocaUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/JLPTVoca.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/JLPTVoca";
+			};
+			name = Debug;
+		};
+		216132BB2E71D3C300DE17B7 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = 3HYFT54PK2;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.JLPTVocaUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/JLPTVoca.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/JLPTVoca";
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -323,6 +434,15 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		216132B92E71D3C300DE17B7 /* Build configuration list for PBXNativeTarget "JLPTVocaUITests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				216132BA2E71D3C300DE17B7 /* Debug */,
+				216132BB2E71D3C300DE17B7 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 /* End XCConfigurationList section */
 	};
 	rootObject = 214FEB582E5E320300C87957 /* Project object */;
diff --git a/JLPTVoca/JLPTVoca/ContentView.swift b/JLPTVoca/JLPTVoca/ContentView.swift
index ad0899f..6cb6090 100644
--- a/JLPTVoca/JLPTVoca/ContentView.swift
+++ b/JLPTVoca/JLPTVoca/ContentView.swift
@@ -31,15 +31,8 @@ struct ContentView: View {
                 }
         }
         .environment(wordManager)
-        .task(id: words) {
-            wordManager.setup(
-                context: context,
-                words: words
-            )
+        .onAppear() {
+            wordManager.setContext(context: context)
         }
     }
 }
-
-#Preview {
-    ContentView()
-}
diff --git a/JLPTVoca/JLPTVoca/Extensions/Logger+Extension.swift b/JLPTVoca/JLPTVoca/Extensions/Logger+Extension.swift
new file mode 100644
index 0000000..2db1659
--- /dev/null
+++ b/JLPTVoca/JLPTVoca/Extensions/Logger+Extension.swift
@@ -0,0 +1,14 @@
+//
+//  Logger+Extension.swift
+//  JLPTVoca
+//
+//  Created by Rama on 9/9/25.
+//
+
+import Foundation
+import OSLog
+
+extension Logger {
+    private static var subsystem = Bundle.main.bundleIdentifier!
+    static let word = Logger(subsystem: subsystem, category: "Word")
+}
diff --git a/JLPTVoca/JLPTVoca/Managers/WordManager.swift b/JLPTVoca/JLPTVoca/Managers/WordManager.swift
index 0d88e3e..80aa66c 100644
--- a/JLPTVoca/JLPTVoca/Managers/WordManager.swift
+++ b/JLPTVoca/JLPTVoca/Managers/WordManager.swift
@@ -1,4 +1,3 @@
-
 //
 //  WordManager.swift
 //  JLPTVoca
@@ -8,43 +7,82 @@
 
 import SwiftUI
 import SwiftData
+import OSLog
 
 @Observable
 final class WordManager {
-    var allWords: [Word] = []
-    var wordDeck: [Word] = []
+    var studyStateDeck: [StudyState] = []
     
     private var context: ModelContext?
     
-    func setup(
-        context: ModelContext,
-        words: [Word]
-    ) {
+    func setContext(context: ModelContext) {
         self.context = context
-        self.allWords = words
     }
     
     func prepareSession() {
-        self.wordDeck = allWords
+        guard context != nil else { return }
+        
+        let reviewableStates = fetchReviewableStates()
+        let newWords = fetchNewWords(limit: 20) //TODO: RawVal 수정, 사용자 학습 목표량으로 수정
+        let newWordStates = createStates(for: newWords)
+        
+        self.studyStateDeck = (reviewableStates + newWordStates).shuffled()
+    }
+    
+    private func fetchData<T: PersistentModel>(with descriptor: FetchDescriptor<T>) -> [T] {
+        guard let context else { return [] }
+        
+        do {
+            return try context.fetch(descriptor)
+        } catch {
+            print("@Log - \(error.localizedDescription)")
+            return []
+        }
+    }
+    
+    private func fetchReviewableStates() -> [StudyState] {
+        let now = Date()
+        let predicate = #Predicate<StudyState> { $0.reviewDate <= now }
+        let descriptor = FetchDescriptor<StudyState>(predicate: predicate)
+        
+        return fetchData(with: descriptor)
+    }
+    
+    func fetchNewWords(limit: Int) -> [Word] {
+        let predicate = #Predicate<Word> { $0.state == nil }
+        var descriptor = FetchDescriptor<Word>(predicate: predicate)
+        descriptor.fetchLimit = limit
+        
+        return fetchData(with: descriptor)
+    }
+    
+    private func createStates(for words: [Word]) -> [StudyState] {
+        guard let context else { return [] }
+        
+        return words.map { newWord in
+            let newState = StudyState(word: newWord)
+            context.insert(newState)
+            return newState
+        }
     }
     
     func onCardSwipe(
         id: UUID,
         direction: CardSwipeDirection
     ) {
-        guard let swipedWord = allWords.first(where: { $0.id == id }) else {
+        guard let swipedState = studyStateDeck.first(where: { $0.word.id == id }) else {
             return
         }
-
+        
         if direction == .left {
-            swipedWord.maturityState += 1
+            swipedState.maturityState = min(swipedState.maturityState + 1, 5)
         } else {
-            swipedWord.maturityState = 2
+            swipedState.maturityState = 1
         }
-
-        wordDeck.removeAll { $0.id == id }
-
-        if wordDeck.isEmpty {
+        updateNextReviewDate(for: swipedState)
+        studyStateDeck.removeAll { $0.word.id == id }
+        
+        if studyStateDeck.isEmpty {
             do {
                 try context?.save()
             } catch {
@@ -52,4 +90,28 @@ final class WordManager {
             }
         }
     }
+    
+    func updateNextReviewDate(for state: StudyState) {
+        let now = Date()
+        let secondsInDay: TimeInterval = 86400
+        var interval: TimeInterval = 0
+        
+        switch state.maturityState {
+        case 1:
+            interval = secondsInDay * 1
+        case 2:
+            interval = secondsInDay * 3
+        case 3:
+            interval = secondsInDay * 7
+        case 4:
+            interval = secondsInDay * 14
+        case 5:
+            interval = secondsInDay * 30
+        default:
+            state.reviewDate = now
+            return
+        }
+        
+        state.reviewDate = now.addingTimeInterval(interval)
+    }
 }
diff --git a/JLPTVoca/JLPTVoca/Models/StudyState.swift b/JLPTVoca/JLPTVoca/Models/StudyState.swift
new file mode 100644
index 0000000..a5a645f
--- /dev/null
+++ b/JLPTVoca/JLPTVoca/Models/StudyState.swift
@@ -0,0 +1,22 @@
+//
+//  StudyState.swift
+//  JLPTVoca
+//
+//  Created by Rama on 9/2/25.
+//
+
+import SwiftUI
+import SwiftData
+
+@Model
+final class StudyState {
+    @Relationship var word: Word
+    
+    var maturityState: Int = 0
+    var reviewDate: Date = Date()
+    var isFavorite: Bool = false
+    
+    init(word: Word) {
+        self.word = word
+    }
+}
diff --git a/JLPTVoca/JLPTVoca/Models/Word.swift b/JLPTVoca/JLPTVoca/Models/Word.swift
index 029980e..49a0ddb 100644
--- a/JLPTVoca/JLPTVoca/Models/Word.swift
+++ b/JLPTVoca/JLPTVoca/Models/Word.swift
@@ -13,30 +13,24 @@ final class Word: Decodable {
     var id: UUID
     var japanese: [RubyText]
     var korean: String
-    var isFavorite: Bool
     var jlptLevel: Int
-    var maturityState: Int
-    var nextReviewDate: Date
     
     var plainJapanese: String {
         japanese.map { $0.text }.joined()
     }
     
+    @Relationship(inverse: \StudyState.word)
+    var state: StudyState?
+    
     init(
         japanese: [RubyText],
         korean: String,
-        jlptLevel: Int,
-        isFavorite: Bool,
-        maturityState: Int,
-        nextReviewDate: Date
+        jlptLevel: Int
     ) {
         self.id = UUID()
         self.japanese = japanese
         self.korean = korean
         self.jlptLevel = jlptLevel
-        self.isFavorite = isFavorite
-        self.maturityState = maturityState
-        self.nextReviewDate = nextReviewDate
     }
     
     required init(from decoder: Decoder) throws {
@@ -46,14 +40,11 @@ final class Word: Decodable {
         self.jlptLevel = try container.decode(Int.self, forKey: .jlptLevel)
         
         self.id = UUID()
-        self.isFavorite = false
-        self.maturityState = 0
-        self.nextReviewDate = Date()
     }
 }
 
 extension Word {
-    enum CodingKeys: String, CodingKey {
+    enum CodingKeys: String, CodingKey { // TODO: 분리
         case japanese, korean, jlptLevel
     }
 }
diff --git a/JLPTVoca/JLPTVoca/Views/DictionaryView.swift b/JLPTVoca/JLPTVoca/Views/DictionaryView.swift
index bd49736..2459ee6 100644
--- a/JLPTVoca/JLPTVoca/Views/DictionaryView.swift
+++ b/JLPTVoca/JLPTVoca/Views/DictionaryView.swift
@@ -12,11 +12,11 @@ struct DictionaryView: View {
     
     var body: some View {
         NavigationStack {
-            List(wordManager.allWords) { word in
+            List(wordManager.studyStateDeck) { state in
                 VStack(alignment: .leading) {
-                    Text(word.plainJapanese)
+                    Text(state.word.plainJapanese)
                         .font(.headline)
-                    Text(word.korean)
+                    Text(state.word.korean)
                         .font(.subheadline)
                         .foregroundStyle(.secondary)
                 }
diff --git a/JLPTVoca/JLPTVoca/Views/WordStudyView.swift b/JLPTVoca/JLPTVoca/Views/WordStudyView.swift
index 30bc262..ee3696a 100644
--- a/JLPTVoca/JLPTVoca/Views/WordStudyView.swift
+++ b/JLPTVoca/JLPTVoca/Views/WordStudyView.swift
@@ -36,7 +36,7 @@ struct WordStudyView: View {
             }, message: {
                 Text("7년 연습생 하고 집에 갈래?") //TODO: RawVal 수정
             })
-        .onChange(of: wordManager.wordDeck) { _, newDeck in
+        .onChange(of: wordManager.studyStateDeck) { _, newDeck in
             if newDeck.isEmpty {
                 showCompletionModal = true
             }
@@ -47,11 +47,11 @@ struct WordStudyView: View {
 extension WordStudyView {
     private func wordDeckView() -> some View {
         ZStack {
-            ForEach(wordManager.wordDeck) { word in
+            ForEach(wordManager.studyStateDeck) { state in
                 WordCardView(
-                    id: word.id,
-                    japanese: word.plainJapanese,
-                    korean: word.korean
+                    id: state.word.id,
+                    japanese: state.word.plainJapanese,
+                    korean: state.word.korean
                 ) {
                     id, direction in
                     wordManager.onCardSwipe(
diff --git a/JLPTVoca/JLPTVocaUITests/JLPTVocaUITests.swift b/JLPTVoca/JLPTVocaUITests/JLPTVocaUITests.swift
new file mode 100644
index 0000000..c372d76
--- /dev/null
+++ b/JLPTVoca/JLPTVocaUITests/JLPTVocaUITests.swift
@@ -0,0 +1,35 @@
+//
+//  JLPTVocaUITests.swift
+//  JLPTVocaUITests
+//
+//  Created by Rama on 9/11/25.
+//
+
+import XCTest
+
+final class JLPTVocaUITests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+        // Any test you write for XCTest can be annotated as throws and async.
+        // Mark your test throws to produce an unexpected failure when your test encounters an uncaught error.
+        // Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards.
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+
+}
diff --git a/JLPTVoca/context-summary.md b/JLPTVoca/context-summary.md
new file mode 100644
index 0000000..2badc1a
--- /dev/null
+++ b/JLPTVoca/context-summary.md
@@ -0,0 +1,18 @@
+# Project Context Summary (As of 2025-09-09 - Pre-Logging)
+
+#### 1. Project Goal
+- iOS 기반의 JLPT 단어 암기 앱 "JLPT Scheduler" 개발.
+
+#### 2. Core Guidelines
+- `ProjectGuideline.md`와 `GEMINI.md`에 명시된 프로젝트 명세와 협업 규칙을 따릅니다.
+
+#### 3. Key Decisions & Work Done (up to pre-logging)
+- **`WordManager.swift` Refactoring**:
+    - **목표**: 데이터 접근 로직의 추상화 및 복합 책임 분리를 통한 코드 직관성 향상.
+    - **결과**: 데이터 접근을 제네릭 `fetchData`로 일원화하고, `prepareSession`의 로직을 명확한 책임 단위의 헬퍼 메서드들(`fetchReviewableStates`, `fetchNewWords`, `createStates`)로 분리하여 가독성과 유지보수성을 개선했습니다.
+- **`ContentView.swift` Review**:
+    - **목표**: View Modifier 사용의 의미적 정확성 검토.
+    - **결과**: 동기적인 `setContext` 호출에는 비동기용 `.task`보다 동기용 `.onAppear`가 더 적합하다고 판단하여 코드를 수정했습니다.
+
+#### 4. Current Status
+- `WordManager` 리팩토링과 `ContentView` 리뷰를 완료했으며, 다음 단계로 Logger 구현을 시작할 준비가 된 상태입니다.
diff --git a/JLPTVoca/project-guideline.md b/JLPTVoca/project-guideline.md
new file mode 100644
index 0000000..82ca723
--- /dev/null
+++ b/JLPTVoca/project-guideline.md
@@ -0,0 +1,77 @@
+# 🎯 JLPT Flashcard App: Mission & Core Product
+
+### 📌 App Overview (App Context)
+
+*   **Project Name (Tentative):** JLPT Scheduler
+*   **Platform & Language:** iOS (Swift)
+*   **Core Problem to Solve:** To efficiently convert about 3,000 JLPT N2 vocabulary words into long-term memory within 6 months without forgetting them.
+*   **Differentiation Strategy:** Focus on an intuitive level system with workload management to keep users motivated, rather than a complex algorithm.
+
+### 👤 Persona
+
+*   **User:** A student preparing for the JLPT for employment purposes.
+*   **Learning Goal:** To obtain the **JLPT N2** certification through consistent study over 6+ months.
+*   **Main Task:** Memorize a set amount of vocabulary (approx. 3,000 words) daily and retain it in long-term memory.
+*   **Biggest Pain Point:** "I forget words as soon as I memorize them." With limited time, a method is needed to systematically manage and review a vast amount of vocabulary.
+
+---
+
+## 🚀 Mission
+
+> To help students preparing for the JLPT for employment to convert thousands of words into perfect long-term memory through a scientific and efficient method, ultimately leading to success in their target exam.
+
+---
+
+## 🧠 Learning Algorithm & Product Specification
+
+> ℹ️ **Note:** The detailed specification for the core learning algorithm is managed in the `WordStability.md` file.
+
+---
+
+## 📱 App UI/UX Breakdown
+
+### 0. Main Navigation (TabView)
+- **Purpose:** Provides the main navigation to move easily between the app's core features (Home, Dictionary, Settings).
+- **Components:**
+    - **First Tab:** `HomeView` (Home Icon)
+    - **Second Tab:** `DictionaryView` (Book Icon)
+    - **Third Tab:** `SettingView` (Settings Icon)
+- **Navigation Flow:**
+    - Starting a session from `HomeView` → Navigates to `WordStudyView`.
+    - Clicking buttons in `DictionaryView` → Navigates to `EntireWordView` or `FavoriteWordView`.
+
+### 1. OnboardingView
+- **Purpose:** To set the user's learning goals upon first launch.
+- **Key Features:** Select target exam level (N1-N5), select target exam date (using a DatePicker), set the daily goal for new words.
+- **Action:** After entering all information, tapping 'Start' → Navigates to `HomeView`.
+
+### 2. HomeView (Main Dashboard)
+- **Purpose:** To summarize overall learning progress and act as the gateway to start a learning session.
+- **Displayed Information:** D-Day counter for the exam, a circular progress bar for the selected level's progress, a toggle to view word counts by maturity level.
+- **Actions:** `Start Learning` button → Navigates to `WordStudyView`, change JLPT level (Dropdown), navigate to Dictionary/Settings.
+
+### 3. WordStudyView (Learning Session Screen)
+- **Purpose:** The core screen for memorizing today's words.
+- **Displayed Information:** Progress bar for the current session (e.g., 15/73), a flashcard (Front: Japanese, Back: Meaning/Furigana).
+- **Actions:** Tap card (to flip), Swipe card (Left: Incorrect / Right: Correct), Bottom buttons (as an alternative to swiping), Favorite button, Back button (shows an alert to confirm ending the session).
+
+### 4. DictionaryView (Dictionary Menu)
+- **Purpose:** Acts as a fork to navigate to either the full word list or the favorite word list.
+- **Actions:**
+    - `[View All Words]` button → Navigates to `EntireWordView`.
+    - `[View Favorite Words]` button → Navigates to `FavoriteWordView`.
+
+### 5. EntireWordView (Full Word List)
+- **Purpose:** To search and view details for all words.
+- **Key Features:** Search field at the top, a scrollable list of all words.
+- **Displayed Information:** Each list cell shows: Japanese, Korean, Furigana, Level, Maturity State, Favorite status.
+- **Actions:** Search for words, toggle favorite status.
+
+### 6. FavoriteWordView (Favorite Word List)
+- **Purpose:** To view and search only the user's favorited words.
+- **Key Features:** Same as `EntireWordView`, but only shows favorited words.
+- **Actions:** Search within favorite words, toggle favorite off (which removes it from the list).
+
+### 7. SettingView
+- **Purpose:** To change the app's main settings.
+- **Actions:** Adjust daily new word goal, reset all learning progress (with a confirmation alert).