diff --git a/app/Services/ProductDisplayPriceService.php b/app/Services/ProductDisplayPriceService.php
index e93f4d2..e1bb7a8 100644
--- a/app/Services/ProductDisplayPriceService.php
+++ b/app/Services/ProductDisplayPriceService.php
@@ -42,18 +42,16 @@ class ProductDisplayPriceService
         $zaarbox = app(ZaarboxPriceService::class);
         $zaarboxFeed = $zaarbox->getCachedPriceListOnly();
 
-        $baseAppPrice = 0;
-        if ($collection->contains(fn ($p) => $p instanceof Product && $this->usesAppPrice($p))) {
-            $baseAppPrice = $this->resolveAppBasePrice();
-        }
-
         foreach ($collection as $product) {
             if (!$product instanceof Product) {
                 continue;
             }
 
             if ($this->usesAppPrice($product)) {
-                $this->applyAppPrice($product, $baseAppPrice);
+                $base = $this->productUsesLastPriceIfZero($product)
+                    ? $this->resolveAppBasePrice()
+                    : $this->resolveStrictLiveAppBasePrice();
+                $this->applyAppPrice($product, $base);
                 continue;
             }
 
@@ -156,6 +154,28 @@ class ProductDisplayPriceService
         return (int) $last->price;
     }
 
+    private function zeroProductPrice(Product $product): void
+    {
+        $product->setAttribute('price', 0);
+        if (Schema::hasColumn($product->getTable(), 'price_profit')) {
+            $product->setAttribute('price_profit', 0);
+        }
+    }
+
+    /**
+     * فقط قیمت زنده (کش /api/price/last) — بدون montzar_live_price قدیمی settings.
+     * وقتی use_last_price_if_zero خاموش است.
+     */
+    public function resolveStrictLiveAppBasePrice(): int
+    {
+        $cached = Cache::get(self::LIVE_PRICE_CACHE_KEY);
+        if (!is_array($cached)) {
+            return 0;
+        }
+
+        return $this->extractBaseFromPayload($cached);
+    }
+
     /** @param array<int, array<string, mixed>> $feed */
     private function applyReferenceFeedPrice(Product $product, array $feed, ZaarboxPriceService $zaarbox): void
     {
@@ -173,7 +193,11 @@ class ProductDisplayPriceService
                     if (Schema::hasColumn($product->getTable(), 'price_profit')) {
                         $product->setAttribute('price_profit', 0);
                     }
+                } else {
+                    $this->zeroProductPrice($product);
                 }
+            } else {
+                $this->zeroProductPrice($product);
             }
 
             return;