diff --git a/desktop/src/app/components/apps/settings/settings.component.html b/desktop/src/app/components/apps/settings/settings.component.html
new file mode 100644
index 0000000..2552c79
--- /dev/null
+++ b/desktop/src/app/components/apps/settings/settings.component.html
@@ -0,0 +1,62 @@
+<div class="settings">
+  <!-- Sidebar -->
+  <div class="settings-sidebar">
+    <div class="settings-title">Settings</div>
+    @for (section of sections; track section.id) {
+      <button
+        class="settings-nav-item"
+        [class.active]="activeSection() === section.id"
+        (click)="activeSection.set(section.id)"
+      >
+        <span class="nav-icon">{{ section.icon }}</span>
+        <span class="nav-label">{{ section.title }}</span>
+      </button>
+    }
+  </div>
+
+  <!-- Content -->
+  <div class="settings-content">
+    @switch (activeSection()) {
+      @case ('display') {
+        <div class="settings-section">
+          <h3>Display Settings</h3>
+          <div class="setting-row">
+            <label>Frame Buffer Size</label>
+            <input type="number" [ngModel]="frameBufferSize()" min="10" max="300" />
+          </div>
+          <div class="setting-desc">Number of frames to buffer for late-joining viewers (default: 60).</div>
+        </div>
+      }
+      @case ('audio') {
+        <div class="settings-section">
+          <h3>Audio Settings</h3>
+          <div class="setting-desc">Audio settings will be available once the VM agent is connected.</div>
+        </div>
+      }
+      @case ('network') {
+        <div class="settings-section">
+          <h3>Network Settings</h3>
+          <div class="setting-row">
+            <label>Server URL</label>
+            <input type="text" [ngModel]="serverUrl()" />
+          </div>
+          <div class="setting-row">
+            <label>Idle Timeout (sec)</label>
+            <input type="number" [ngModel]="idleTimeout()" min="30" max="3600" />
+          </div>
+        </div>
+      }
+      @case ('about') {
+        <div class="settings-section">
+          <h3>About Butterfly</h3>
+          <div class="about-info">
+            <div class="about-row"><span>Version</span><span>0.1.0</span></div>
+            <div class="about-row"><span>Backend</span><span>Rust / Actix-Web 4</span></div>
+            <div class="about-row"><span>Frontend</span><span>Angular 21</span></div>
+            <div class="about-row"><span>Protocol</span><span>WebSocket + REST</span></div>
+          </div>
+        </div>
+      }
+    }
+  </div>
+</div>
diff --git a/desktop/src/app/components/apps/settings/settings.component.scss b/desktop/src/app/components/apps/settings/settings.component.scss
new file mode 100644
index 0000000..1342a56
--- /dev/null
+++ b/desktop/src/app/components/apps/settings/settings.component.scss
@@ -0,0 +1,127 @@
+:host {
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+
+.settings {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  background: #1e1e1e;
+}
+
+.settings-sidebar {
+  width: 200px;
+  background: #252526;
+  border-right: 1px solid #404040;
+  padding: 12px 0;
+  flex-shrink: 0;
+  overflow-y: auto;
+}
+
+.settings-title {
+  padding: 0 16px 12px;
+  font-size: 16px;
+  font-weight: 600;
+  color: #e0e0e0;
+}
+
+.settings-nav-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  padding: 8px 16px;
+  border: none;
+  background: transparent;
+  color: #ccc;
+  font-size: 13px;
+  cursor: pointer;
+  text-align: left;
+
+  &:hover {
+    background: rgba(255, 255, 255, 0.04);
+  }
+
+  &.active {
+    background: rgba(0, 120, 212, 0.15);
+    color: #fff;
+    border-left: 2px solid #0078d4;
+  }
+}
+
+.nav-icon {
+  font-size: 16px;
+}
+
+.settings-content {
+  flex: 1;
+  padding: 24px;
+  overflow-y: auto;
+}
+
+.settings-section {
+  max-width: 500px;
+
+  h3 {
+    margin: 0 0 16px;
+    color: #e0e0e0;
+    font-size: 18px;
+    font-weight: 500;
+  }
+}
+
+.setting-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 8px;
+
+  label {
+    color: #ccc;
+    font-size: 13px;
+  }
+
+  input {
+    width: 120px;
+    height: 30px;
+    padding: 0 8px;
+    border: 1px solid #555;
+    border-radius: 4px;
+    background: #383838;
+    color: #e0e0e0;
+    font-size: 13px;
+    outline: none;
+
+    &:focus {
+      border-color: #0078d4;
+    }
+  }
+}
+
+.setting-desc {
+  font-size: 12px;
+  color: #888;
+  margin-top: 4px;
+}
+
+.about-info {
+  margin-top: 12px;
+}
+
+.about-row {
+  display: flex;
+  justify-content: space-between;
+  padding: 8px 0;
+  border-bottom: 1px solid #333;
+  font-size: 13px;
+
+  span:first-child {
+    color: #999;
+  }
+
+  span:last-child {
+    color: #e0e0e0;
+  }
+}
diff --git a/desktop/src/app/components/apps/settings/settings.component.ts b/desktop/src/app/components/apps/settings/settings.component.ts
new file mode 100644
index 0000000..7f885a4
--- /dev/null
+++ b/desktop/src/app/components/apps/settings/settings.component.ts
@@ -0,0 +1,31 @@
+import { Component, signal } from '@angular/core';
+import { CommonModule } from '@angular/common';
+
+interface SettingSection {
+  id: string;
+  title: string;
+  icon: string;
+}
+
+@Component({
+  selector: 'app-settings',
+  standalone: true,
+  imports: [CommonModule],
+  templateUrl: './settings.component.html',
+  styleUrl: './settings.component.scss',
+})
+export class SettingsComponent {
+  readonly activeSection = signal('display');
+
+  sections: SettingSection[] = [
+    { id: 'display', title: 'Display', icon: '🖥️' },
+    { id: 'audio', title: 'Audio', icon: '🔊' },
+    { id: 'network', title: 'Network', icon: '🌐' },
+    { id: 'about', title: 'About', icon: 'ℹ️' },
+  ];
+
+  readonly serverUrl = signal(window.location.origin);
+  readonly maxSessions = signal('100');
+  readonly frameBufferSize = signal('60');
+  readonly idleTimeout = signal('300');
+}