diff --git a/api/database.php b/api/database.php
index f8d5a82..9bb0819 100644
--- a/api/database.php
+++ b/api/database.php
@@ -76,4 +76,46 @@ function migrateDB(PDO $db): void {
     if (!in_array('package_unit', $colNames)) {
         $db->exec("ALTER TABLE products ADD COLUMN package_unit TEXT DEFAULT ''");
     }
+
+    // --- New shared tables ---
+    // app_settings: key-value store shared across all devices
+    $tables = $db->query("SELECT name FROM sqlite_master WHERE type='table' AND name='app_settings'")->fetchAll();
+    if (empty($tables)) {
+        $db->exec("
+            CREATE TABLE app_settings (
+                key TEXT PRIMARY KEY,
+                value TEXT NOT NULL DEFAULT '',
+                updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+            );
+        ");
+    }
+
+    // recipes: one per meal per day (last wins)
+    $tables = $db->query("SELECT name FROM sqlite_master WHERE type='table' AND name='recipes'")->fetchAll();
+    if (empty($tables)) {
+        $db->exec("
+            CREATE TABLE recipes (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                date TEXT NOT NULL,
+                meal TEXT NOT NULL,
+                recipe_json TEXT NOT NULL,
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                UNIQUE(date, meal)
+            );
+            CREATE INDEX idx_recipes_date ON recipes(date);
+        ");
+    }
+
+    // chat_messages: shared chat history
+    $tables = $db->query("SELECT name FROM sqlite_master WHERE type='table' AND name='chat_messages'")->fetchAll();
+    if (empty($tables)) {
+        $db->exec("
+            CREATE TABLE chat_messages (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                role TEXT NOT NULL,
+                text TEXT NOT NULL,
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+            );
+        ");
+    }
 }
diff --git a/api/index.php b/api/index.php
index fb957d3..5767db8 100644
--- a/api/index.php
+++ b/api/index.php
@@ -148,6 +148,32 @@ try {
             }
             break;
 
+        // ===== SHARED APP DATA =====
+        case 'app_settings_get':
+            appSettingsGet($db);
+            break;
+        case 'app_settings_save':
+            appSettingsSave($db);
+            break;
+        case 'recipes_list':
+            recipesList($db);
+            break;
+        case 'recipes_save':
+            recipesSave($db);
+            break;
+        case 'recipes_delete':
+            recipesDelete($db);
+            break;
+        case 'chat_list':
+            chatList($db);
+            break;
+        case 'chat_save':
+            chatSave($db);
+            break;
+        case 'chat_clear':
+            chatClear($db);
+            break;
+
         default:
             http_response_code(404);
             echo json_encode(['error' => 'Unknown action: ' . $action]);
@@ -1197,10 +1223,22 @@ function generateRecipe(PDO $db): void {
         $dietaryText = "\n\nRESTRIZIONI ALIMENTARI:\n{$dietaryRestrictions}\nRispetta SEMPRE queste restrizioni.";
     }
 
-    // Today's previous recipes - avoid repetition
+    // Today's previous recipes from DB - avoid repetition
     $todayText = '';
+    $today = date('Y-m-d');
+    $todayStmt = $db->prepare("SELECT recipe_json FROM recipes WHERE date = ?");
+    $todayStmt->execute([$today]);
+    $todayDbRecipes = $todayStmt->fetchAll();
+    $todayTitles = [];
+    foreach ($todayDbRecipes as $tr) {
+        $rj = json_decode($tr['recipe_json'], true);
+        if (!empty($rj['title'])) $todayTitles[] = $rj['title'];
+    }
     if (!empty($todayRecipes)) {
-        $todayList = implode(', ', array_map(function($t) { return '"' . $t . '"'; }, $todayRecipes));
+        $todayTitles = array_unique(array_merge($todayTitles, $todayRecipes));
+    }
+    if (!empty($todayTitles)) {
+        $todayList = implode(', ', array_map(function($t) { return '"' . $t . '"'; }, $todayTitles));
         $todayText = "\n\nRICETTE GIÀ PREPARATE OGGI:\n{$todayList}\nNON proporre una ricetta simile o con lo stesso concetto di quelle già fatte oggi. Varia il tipo di piatto, gli ingredienti principali e lo stile di cucina. Ad esempio se a pranzo c'era una piadina, a cena proponi pasta, riso, zuppa o altro — MAI un'altra piadina o wrap o piatto concettualmente simile.";
     }
 
@@ -2479,3 +2517,98 @@ function formatDupliclickProduct(array $p): array {
     
     return $result;
 }
+
+// ===== SHARED APP DATA FUNCTIONS =====
+
+function appSettingsGet(PDO $db): void {
+    $rows = $db->query("SELECT key, value FROM app_settings")->fetchAll();
+    $settings = [];
+    foreach ($rows as $row) {
+        $settings[$row['key']] = json_decode($row['value'], true) ?? $row['value'];
+    }
+    echo json_encode(['success' => true, 'settings' => $settings]);
+}
+
+function appSettingsSave(PDO $db): void {
+    $input = json_decode(file_get_contents('php://input'), true);
+    if (!$input || !is_array($input['settings'] ?? null)) {
+        echo json_encode(['error' => 'Missing settings object']);
+        return;
+    }
+    $stmt = $db->prepare("INSERT INTO app_settings (key, value, updated_at) VALUES (?, ?, datetime('now'))
+                          ON CONFLICT(key) DO UPDATE SET value = excluded.value, updated_at = excluded.updated_at");
+    foreach ($input['settings'] as $key => $value) {
+        $stmt->execute([$key, json_encode($value)]);
+    }
+    echo json_encode(['success' => true]);
+}
+
+function recipesList(PDO $db): void {
+    $limit = min(intval($_GET['limit'] ?? 60), 200);
+    $rows = $db->query("SELECT id, date, meal, recipe_json, created_at FROM recipes ORDER BY date DESC, created_at DESC LIMIT {$limit}")->fetchAll();
+    $recipes = [];
+    foreach ($rows as $row) {
+        $recipes[] = [
+            'id' => $row['id'],
+            'date' => $row['date'],
+            'meal' => $row['meal'],
+            'recipe' => json_decode($row['recipe_json'], true),
+            'savedAt' => strtotime($row['created_at']) * 1000
+        ];
+    }
+    echo json_encode(['success' => true, 'recipes' => $recipes]);
+}
+
+function recipesSave(PDO $db): void {
+    $input = json_decode(file_get_contents('php://input'), true);
+    $date = $input['date'] ?? date('Y-m-d');
+    $meal = $input['meal'] ?? '';
+    $recipe = $input['recipe'] ?? null;
+
+    if (!$meal || !$recipe) {
+        echo json_encode(['error' => 'Missing meal or recipe']);
+        return;
+    }
+
+    // UPSERT: one recipe per meal per day (last one wins)
+    $stmt = $db->prepare("INSERT INTO recipes (date, meal, recipe_json, created_at) VALUES (?, ?, ?, datetime('now'))
+                          ON CONFLICT(date, meal) DO UPDATE SET recipe_json = excluded.recipe_json, created_at = excluded.created_at");
+    $stmt->execute([$date, $meal, json_encode($recipe)]);
+
+    echo json_encode(['success' => true, 'id' => $db->lastInsertId()]);
+}
+
+function recipesDelete(PDO $db): void {
+    $input = json_decode(file_get_contents('php://input'), true);
+    $id = intval($input['id'] ?? 0);
+    if ($id > 0) {
+        $db->prepare("DELETE FROM recipes WHERE id = ?")->execute([$id]);
+    }
+    echo json_encode(['success' => true]);
+}
+
+function chatList(PDO $db): void {
+    $rows = $db->query("SELECT id, role, text, created_at FROM chat_messages ORDER BY id ASC LIMIT 100")->fetchAll();
+    echo json_encode(['success' => true, 'messages' => $rows]);
+}
+
+function chatSave(PDO $db): void {
+    $input = json_decode(file_get_contents('php://input'), true);
+    $messages = $input['messages'] ?? [];
+    if (empty($messages)) {
+        echo json_encode(['error' => 'No messages']);
+        return;
+    }
+    $stmt = $db->prepare("INSERT INTO chat_messages (role, text, created_at) VALUES (?, ?, datetime('now'))");
+    foreach ($messages as $msg) {
+        if (!empty($msg['role']) && isset($msg['text'])) {
+            $stmt->execute([$msg['role'], $msg['text']]);
+        }
+    }
+    echo json_encode(['success' => true]);
+}
+
+function chatClear(PDO $db): void {
+    $db->exec("DELETE FROM chat_messages");
+    echo json_encode(['success' => true]);
+}
diff --git a/assets/js/app.js b/assets/js/app.js
index 54882d0..d5a4aec 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -392,24 +392,77 @@ async function enumerateCameras() {
 }
 
 // ===== SETTINGS / CONFIG =====
+let _settingsCache = null;
+let _settingsDirty = false;
+
 function getSettings() {
-    try {
-        const s = JSON.parse(localStorage.getItem('dispensa_settings') || '{}');
-        // Build recipe_prefs array from individual booleans
-        s.recipe_prefs = [];
-        if (s.pref_veloce) s.recipe_prefs.push('veloce');
-        if (s.pref_pocafame) s.recipe_prefs.push('pocafame');
-        if (s.pref_scadenze) s.recipe_prefs.push('scadenze');
-        if (s.pref_healthy) s.recipe_prefs.push('salutare');
-        if (s.pref_comfort) s.recipe_prefs.push('comfort');
-        if (s.pref_zerowaste) s.recipe_prefs.push('zerowaste');
-        s.dietary_restrictions = s.dietary || '';
-        return s;
-    } catch(e) { return {}; }
+    if (!_settingsCache) {
+        try {
+            _settingsCache = JSON.parse(localStorage.getItem('dispensa_settings') || '{}');
+        } catch(e) { _settingsCache = {}; }
+    }
+    const s = _settingsCache;
+    // Build recipe_prefs array from individual booleans
+    s.recipe_prefs = [];
+    if (s.pref_veloce) s.recipe_prefs.push('veloce');
+    if (s.pref_pocafame) s.recipe_prefs.push('pocafame');
+    if (s.pref_scadenze) s.recipe_prefs.push('scadenze');
+    if (s.pref_healthy) s.recipe_prefs.push('salutare');
+    if (s.pref_comfort) s.recipe_prefs.push('comfort');
+    if (s.pref_zerowaste) s.recipe_prefs.push('zerowaste');
+    s.dietary_restrictions = s.dietary || '';
+    return s;
 }
 
 function saveSettingsToStorage(settings) {
+    _settingsCache = settings;
     localStorage.setItem('dispensa_settings', JSON.stringify(settings));
+    // Persist to DB
+    _settingsDirty = true;
+    _debouncedSyncSettings();
+}
+
+const _debouncedSyncSettings = debounce(function() {
+    if (!_settingsDirty) return;
+    _settingsDirty = false;
+    const s = getSettings();
+    // Don't sync secrets or device-specific settings to shared DB
+    const shared = {
+        default_persons: s.default_persons,
+        pref_veloce: s.pref_veloce,
+        pref_pocafame: s.pref_pocafame,
+        pref_scadenze: s.pref_scadenze,
+        pref_healthy: s.pref_healthy,
+        pref_comfort: s.pref_comfort,
+        pref_zerowaste: s.pref_zerowaste,
+        dietary: s.dietary,
+        appliances: s.appliances,
+        spesa_provider: s.spesa_provider,
+        spesa_ai_prompt: s.spesa_ai_prompt
+    };
+    api('app_settings_save', {}, 'POST', { settings: { user_prefs: shared } }).catch(() => {});
+}, 1000);
+
+function debounce(fn, ms) {
+    let t; return function(...args) { clearTimeout(t); t = setTimeout(() => fn(...args), ms); };
+}
+
+async function syncSettingsFromDB() {
+    try {
+        const res = await api('app_settings_get');
+        if (res.success && res.settings && res.settings.user_prefs) {
+            const db = res.settings.user_prefs;
+            const s = getSettings();
+            // Merge DB settings into local (DB wins for shared prefs)
+            for (const key of ['default_persons','pref_veloce','pref_pocafame','pref_scadenze',
+                'pref_healthy','pref_comfort','pref_zerowaste','dietary','appliances',
+                'spesa_provider','spesa_ai_prompt']) {
+                if (db[key] !== undefined) s[key] = db[key];
+            }
+            _settingsCache = s;
+            localStorage.setItem('dispensa_settings', JSON.stringify(s));
+        }
+    } catch(e) { /* offline, use local */ }
 }
 
 async function loadSettingsUI() {
@@ -773,6 +826,8 @@ function setReviewConfirmed(inventoryId) {
     const c = getReviewConfirmed();
     c[inventoryId] = Date.now();
     localStorage.setItem('review_confirmed', JSON.stringify(c));
+    // Also persist to shared DB
+    api('app_settings_save', {}, 'POST', { settings: { review_confirmed: c } }).catch(() => {});
 }
 
 async function loadReviewItems() {
@@ -4027,24 +4082,32 @@ const MEAL_LABELS = {
     'cena': '🌙 Cena'
 };
 
-// ===== RECIPE ARCHIVE =====
-function getRecipeArchive() {
+// ===== RECIPE ARCHIVE (DB-backed) =====
+let _recipeArchiveCache = null;
+
+async function getRecipeArchive() {
+    if (_recipeArchiveCache !== null) return _recipeArchiveCache;
     try {
-        return JSON.parse(localStorage.getItem('dispensa_recipe_archive') || '[]');
-    } catch { return []; }
+        const res = await api('recipes_list');
+        if (res.success) {
+            _recipeArchiveCache = res.recipes || [];
+            return _recipeArchiveCache;
+        }
+    } catch(e) { console.warn('Failed to load recipes from DB:', e); }
+    return [];
 }
 
-function saveRecipeToArchive(recipe) {
-    const archive = getRecipeArchive();
+async function saveRecipeToArchive(recipe) {
     const today = new Date().toISOString().slice(0, 10);
-    archive.unshift({ date: today, meal: recipe.meal, recipe, savedAt: Date.now() });
-    // Keep max 60 recipes
-    if (archive.length > 60) archive.length = 60;
-    localStorage.setItem('dispensa_recipe_archive', JSON.stringify(archive));
+    try {
+        await api('recipes_save', {}, 'POST', { date: today, meal: recipe.meal, recipe });
+        // Invalidate cache so next load fetches fresh data
+        _recipeArchiveCache = null;
+    } catch(e) { console.error('Failed to save recipe:', e); }
 }
 
-function getTodayRecipeTitles() {
-    const archive = getRecipeArchive();
+async function getTodayRecipeTitles() {
+    const archive = await getRecipeArchive();
     const today = new Date().toISOString().slice(0, 10);
     return archive
         .filter(e => e.date === today && e.recipe && e.recipe.title)
@@ -4053,10 +4116,10 @@ function getTodayRecipeTitles() {
 
 let _recipeArchiveEntries = [];
 
-function loadRecipeArchive() {
+async function loadRecipeArchive() {
     const container = document.getElementById('recipe-archive');
     if (!container) return;
-    const archive = getRecipeArchive();
+    const archive = await getRecipeArchive();
     _recipeArchiveEntries = archive;
     
     if (archive.length === 0) {
@@ -4119,6 +4182,8 @@ function viewArchivedRecipe(idx) {
     document.getElementById('recipe-result').style.display = '';
 }
 
+let _cachedRecipe = null;
+
 function openRecipeDialog() {
     const meal = getMealType();
     const settings = getSettings();
@@ -4126,16 +4191,13 @@ function openRecipeDialog() {
     document.getElementById('recipe-overlay').style.display = 'flex';
 
     // Check for cached recipe matching current meal type
-    try {
-        const cached = JSON.parse(localStorage.getItem('cachedRecipe') || 'null');
-        if (cached && cached.meal === meal && cached.recipe) {
-            document.getElementById('recipe-ask').style.display = 'none';
-            document.getElementById('recipe-loading').style.display = 'none';
-            renderRecipe(cached.recipe);
-            document.getElementById('recipe-result').style.display = '';
-            return;
-        }
-    } catch (e) { /* ignore parse errors */ }
+    if (_cachedRecipe && _cachedRecipe.meal === meal && _cachedRecipe.recipe) {
+        document.getElementById('recipe-ask').style.display = 'none';
+        document.getElementById('recipe-loading').style.display = 'none';
+        renderRecipe(_cachedRecipe.recipe);
+        document.getElementById('recipe-result').style.display = '';
+        return;
+    }
 
     // Pre-fill persons from settings
     document.getElementById('recipe-persons').value = settings.default_persons || 1;
@@ -4198,13 +4260,9 @@ async function useRecipeIngredient(idx, productId, location, qtyNumber, btn) {
             btn.classList.add('btn-used');
 
             // Persist used state in cached recipe
-            try {
-                const cached = JSON.parse(localStorage.getItem('cachedRecipe') || 'null');
-                if (cached && cached.recipe && cached.recipe.ingredients && cached.recipe.ingredients[idx]) {
-                    cached.recipe.ingredients[idx].used = true;
-                    localStorage.setItem('cachedRecipe', JSON.stringify(cached));
-                }
-            } catch (e) { /* ignore */ }
+            if (_cachedRecipe && _cachedRecipe.recipe && _cachedRecipe.recipe.ingredients && _cachedRecipe.recipe.ingredients[idx]) {
+                _cachedRecipe.recipe.ingredients[idx].used = true;
+            }
 
             showToast('📦 Ingrediente scalato dalla dispensa!', 'success');
             if (result.added_to_bring) {
@@ -4294,7 +4352,7 @@ function renderRecipe(r) {
 }
 
 function regenerateRecipe() {
-    localStorage.removeItem('cachedRecipe');
+    _cachedRecipe = null;
     document.getElementById('recipe-result').style.display = 'none';
     document.getElementById('recipe-loading').style.display = 'none';
     const meal = getMealType();
@@ -4334,7 +4392,7 @@ async function generateRecipe() {
             options,
             appliances: settings.appliances || [],
             dietary_restrictions: settings.dietary_restrictions || '',
-            today_recipes: getTodayRecipeTitles()
+            today_recipes: await getTodayRecipeTitles()
         });
 
         if (!result.success) {
@@ -4354,8 +4412,8 @@ async function generateRecipe() {
         // Save to archive
         saveRecipeToArchive(r);
 
-        // Cache the recipe for this meal type
-        localStorage.setItem('cachedRecipe', JSON.stringify({ meal, recipe: r }));
+        // Cache the recipe for this meal type (in-memory only)
+        _cachedRecipe = { meal, recipe: r };
 
         document.getElementById('recipe-loading').style.display = 'none';
         document.getElementById('recipe-result').style.display = '';
@@ -4373,14 +4431,13 @@ let chatHistory = [];
 let chatInventoryContext = null;
 
 function initChat() {
-    // Load chat history from localStorage
-    const saved = localStorage.getItem('gemini_chat_history');
-    if (saved) {
-        try {
-            chatHistory = JSON.parse(saved);
+    // Load chat history from DB
+    api('chat_list').then(res => {
+        if (res.success && res.messages && res.messages.length > 0) {
+            chatHistory = res.messages.map(m => ({ role: m.role, text: m.text }));
             renderChatHistory();
-        } catch(e) { chatHistory = []; }
-    }
+        }
+    }).catch(() => {});
     // Pre-load inventory context
     loadChatContext();
     // Focus input
@@ -4515,7 +4572,7 @@ function scrollChatBottom() {
 
 function clearChat() {
     chatHistory = [];
-    localStorage.removeItem('gemini_chat_history');
+    api('chat_clear', {}, 'POST').catch(() => {});
     const container = document.getElementById('chat-messages');
     container.innerHTML = `
         <div class="chat-welcome">
@@ -4536,11 +4593,14 @@ function clearChat() {
 function saveChatHistory() {
     // Keep last 50 messages max
     if (chatHistory.length > 50) chatHistory = chatHistory.slice(-50);
-    localStorage.setItem('gemini_chat_history', JSON.stringify(chatHistory));
+    // Save last 2 messages (the newest pair) to DB
+    const newMsgs = chatHistory.slice(-2);
+    api('chat_save', {}, 'POST', { messages: newMsgs }).catch(() => {});
 }
 
 // ===== INITIALIZATION =====
 document.addEventListener('DOMContentLoaded', () => {
+    syncSettingsFromDB();
     showPage('dashboard');
 });
 
diff --git a/data/dispensa.db b/data/dispensa.db
index e8de3f4..43274da 100644
Binary files a/data/dispensa.db and b/data/dispensa.db differ
diff --git a/index.html b/index.html
index d227587..47c2b0c 100644
--- a/index.html
+++ b/index.html
@@ -858,6 +858,6 @@
     <div class="modal-content" id="modal-content" onclick="event.stopPropagation()"></div>
 </div>
 
-<script src="assets/js/app.js?v=20260312x"></script>
+<script src="assets/js/app.js?v=20260312y"></script>
 </body>
 </html>