diff --git a/backend/routes.py b/backend/routes.py
index bb1edb0..793f3e8 100644
--- a/backend/routes.py
+++ b/backend/routes.py
@@ -1,4 +1,5 @@
 import asyncio
+import json
 import shutil
 import uuid
 from datetime import datetime, timezone
@@ -45,6 +46,38 @@ async def get_topics():
     return db_topics + sorted(derived - set(db_topics))
 
 
+@router.get("/stats")
+async def get_stats():
+    """Tracker: Themen-Anzahl + pro Format erstellt/absolviert (alle Kapitel abgehakt)."""
+    guides = await list_guides()
+    themen = set(await db_list_topics()) | {g["topic"] for g in guides} | set(bausteine_topics())
+    if PROJECTS_DIR.is_dir():
+        themen |= {e.name for e in PROJECTS_DIR.iterdir() if e.is_dir()}
+
+    formate = {}
+    for fmt in ("MiniGuide", "Guide", "FullGuide"):
+        # Pro Thema zählt nur der neueste fertige Guide (Altläufe teilen die Content-Datei)
+        neueste: dict[str, dict] = {}
+        for g in guides:
+            if g["format"] == fmt and g["status"] == "done":
+                if g["topic"] not in neueste or g["created_at"] > neueste[g["topic"]]["created_at"]:
+                    neueste[g["topic"]] = g
+        absolviert = 0
+        for g in neueste.values():
+            path = guide_content_path(g["topic"], fmt)
+            if not path.exists():
+                continue
+            try:
+                chapters = json.loads(path.read_text(encoding="utf-8")).get("chapters", [])
+            except ValueError:
+                continue
+            titles = {c.get("title") for c in chapters}
+            if titles and titles <= set(await list_progress(g["id"])):
+                absolviert += 1
+        formate[fmt] = {"erstellt": len(neueste), "absolviert": absolviert}
+    return {"themen": len(themen), "formate": formate}
+
+
 @router.post("/topics")
 async def add_topic(req: TopicCreateRequest):
     await create_topic(req.name.strip())
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index f665dd9..94e38e5 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -1,6 +1,6 @@
 <script setup>
 import { ref, computed, onMounted, onUnmounted, nextTick } from 'vue'
-import { fetchGuides, fetchTopics, createTopic as apiCreateTopic, deleteTopic as apiDeleteTopic, createGuide as apiCreate, deleteGuide, cancelGuide as apiCancel, fetchBausteineStatus, fetchActiveBausteine, createBausteine as apiCreateBausteine, cancelBausteine as apiCancelBausteine, deleteBausteine as apiDeleteBausteine, fetchProjects, deleteProject as apiDeleteProject, fetchProviders } from './api.js'
+import { fetchGuides, fetchTopics, createTopic as apiCreateTopic, deleteTopic as apiDeleteTopic, createGuide as apiCreate, deleteGuide, cancelGuide as apiCancel, fetchBausteineStatus, fetchActiveBausteine, createBausteine as apiCreateBausteine, cancelBausteine as apiCancelBausteine, deleteBausteine as apiDeleteBausteine, fetchProjects, deleteProject as apiDeleteProject, fetchProviders, fetchStats } from './api.js'
 import TopicSidebar from './components/TopicSidebar.vue'
 import TopicDetail from './components/TopicDetail.vue'
 
@@ -21,6 +21,15 @@ const bausteine = ref({ ...EMPTY_BAUSTEINE })
 const activeBausteine = ref([])
 const provider = ref(localStorage.getItem('provider') || 'claude')
 const providers = ref([])
+const stats = ref(null)
+
+async function loadStats() {
+  try {
+    stats.value = await fetchStats()
+  } catch (e) {
+    console.error('Fehler beim Laden der Statistik:', e)
+  }
+}
 
 function setProvider(id) {
   provider.value = id
@@ -112,6 +121,7 @@ async function loadTopics() {
 async function loadGuides() {
   try {
     guides.value = await fetchGuides()
+    loadStats()
   } catch (e) {
     console.error('Fehler beim Laden:', e)
   }
@@ -288,6 +298,7 @@ onUnmounted(() => {
       :topics="topics"
       :projects="projectNames"
       :selectedTopic="selectedTopic"
+      :stats="stats"
       :doneByFormat="doneByFormat"
       :latestByFormat="latestByFormat"
       :allGuides="guides"
@@ -318,6 +329,7 @@ onUnmounted(() => {
       :previewGuide="previewGuide"
       :dark="darkMode"
       :provider="provider"
+      @progressChanged="loadStats"
     />
     <div v-else class="empty-main">
       <p>Thema in der Sidebar anlegen oder auswählen.</p>
diff --git a/frontend/src/api.js b/frontend/src/api.js
index ab75ebd..a527cce 100644
--- a/frontend/src/api.js
+++ b/frontend/src/api.js
@@ -41,6 +41,11 @@ export async function deleteBausteine(topic) {
   await fetch(`${BASE}/bausteine?topic=${encodeURIComponent(topic)}`, { method: 'DELETE' })
 }
 
+export async function fetchStats() {
+  const res = await fetch(`${BASE}/stats`)
+  return res.json()
+}
+
 export async function fetchProviders() {
   const res = await fetch(`${BASE}/providers`)
   return res.json()
diff --git a/frontend/src/components/TopicDetail.vue b/frontend/src/components/TopicDetail.vue
index 0532aa2..9b485ba 100644
--- a/frontend/src/components/TopicDetail.vue
+++ b/frontend/src/components/TopicDetail.vue
@@ -28,6 +28,8 @@ const props = defineProps({
   provider: { type: String, default: 'claude' },
 })
 
+const emit = defineEmits(['progressChanged'])
+
 const isOnePager = computed(() => props.previewGuide?.format === 'OnePager')
 
 // --- Inhalt laden ---
@@ -73,6 +75,7 @@ async function toggleChapter(title) {
   try {
     const res = await setProgress(props.previewGuide.id, title, newState)
     doneChapters.value = new Set(res.chapters || [])
+    emit('progressChanged')
   } catch {
     const rollback = new Set(doneChapters.value)
     if (newState) rollback.delete(title)
diff --git a/frontend/src/components/TopicSidebar.vue b/frontend/src/components/TopicSidebar.vue
index 01ae03a..ade8bcd 100644
--- a/frontend/src/components/TopicSidebar.vue
+++ b/frontend/src/components/TopicSidebar.vue
@@ -5,6 +5,7 @@ const props = defineProps({
   topics: { type: Array, required: true },
   projects: { type: Array, default: () => [] },
   selectedTopic: { type: String, default: null },
+  stats: { type: Object, default: null },
   doneByFormat: { type: Object, default: () => ({}) },
   latestByFormat: { type: Object, default: () => ({}) },
   allGuides: { type: Array, default: () => [] },
@@ -25,6 +26,19 @@ function providerAvailable(id) {
 
 const PROVIDER_LABELS = { claude: 'Claude', minimax: 'MiniMax', lokal: 'Lokal' }
 
+// Tracker oben in der Navigation: Themen gesamt, pro Format erstellt/absolviert
+const trackerItems = computed(() => {
+  if (!props.stats) return []
+  const f = props.stats.formate || {}
+  const fmt = (k) => `${f[k]?.absolviert ?? 0}/${f[k]?.erstellt ?? 0}`
+  return [
+    { label: 'Themen', value: String(props.stats.themen ?? 0), title: 'Themen inkl. Projekte' },
+    { label: 'MiniGuides', value: fmt('MiniGuide'), title: 'absolviert/erstellt' },
+    { label: 'Guides', value: fmt('Guide'), title: 'absolviert/erstellt' },
+    { label: 'FullGuides', value: fmt('FullGuide'), title: 'absolviert/erstellt' },
+  ]
+})
+
 const formats = [
   { key: 'OnePager', label: 'OnePager' },
   { key: 'MiniGuide', label: 'MiniGuide' },
@@ -167,6 +181,12 @@ function confirmDeleteProject(name) {
 
 <template>
   <aside class="sidebar" @mouseleave="emit('sidebarLeave')">
+    <div class="stats-bar" v-if="trackerItems.length">
+      <div class="stat" v-for="item in trackerItems" :key="item.label" :title="item.title">
+        <span class="stat-value">{{ item.value }}</span>
+        <span class="stat-label">{{ item.label }}</span>
+      </div>
+    </div>
     <div class="new-topic">
       <button
         class="pin-btn"
@@ -407,6 +427,40 @@ function confirmDeleteProject(name) {
   border-color: var(--accent-border);
 }
 
+.stats-bar {
+  display: flex;
+  padding: 0.5rem 0.75rem;
+  gap: 4px;
+  border-bottom: 1px solid var(--border);
+}
+
+.stat {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 1px;
+  padding: 4px 2px;
+  background: var(--panel-soft);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  cursor: default;
+}
+
+.stat-value {
+  font-size: 0.8rem;
+  font-weight: 700;
+  color: var(--text);
+}
+
+.stat-label {
+  font-size: 0.58rem;
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+  color: var(--text-faint);
+  white-space: nowrap;
+}
+
 .provider-toggle {
   display: flex;
   gap: 0;