diff --git a/app/exchange.tsx b/app/exchange.tsx
index 803426e..a216ba3 100644
--- a/app/exchange.tsx
+++ b/app/exchange.tsx
@@ -1,3 +1,5 @@
+import { useBalance } from '@/hooks/use-balance';
+import { usePricing } from '@/hooks/use-pricing';
 import Ionicons from '@expo/vector-icons/Ionicons';
 import { useRouter } from 'expo-router';
 import React, { useCallback, useMemo, useState } from 'react';
@@ -12,8 +14,6 @@ import {
   View
 } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
-import { useBalance } from '@/hooks/use-balance';
-import { usePricing } from '@/hooks/use-pricing';
 
 type PurchaseTab = 'subscription' | 'pack';
 
@@ -44,19 +44,14 @@ const TABS: { key: PurchaseTab; label: string }[] = [
   { key: 'pack', label: 'points pack' },
 ];
 
-const POINT_BUNDLES: PointsBundle[] = [
-  { id: 'bundle-500', points: 500, price: 35 },
-  { id: 'bundle-2000', points: 2000, price: 140 },
-  { id: 'bundle-5000', points: 5000, price: 350 },
-  { id: 'bundle-10000', points: 10000, price: 700 },
-];
+const POINT_BUNDLES: PointsBundle[] = [];
 
 export default function PointsExchangeScreen() {
   const router = useRouter();
   const insets = useSafeAreaInsets();
   const [activeTab, setActiveTab] = useState<PurchaseTab>('subscription');
   const [selectedBundleId, setSelectedBundleId] = useState<string | null>(null);
-  const [selectedSubscriptionIndex, setSelectedSubscriptionIndex] = useState<number | null>(null);
+  const [selectedSubscriptionIndex, setSelectedSubscriptionIndex] = useState<number | null>(0);
   const [customAmount, setCustomAmount] = useState<string>('500');
 
   const { balance, isLoading: isBalanceLoading, refresh } = useBalance();
@@ -139,26 +134,14 @@ export default function PointsExchangeScreen() {
           ]
         );
       } else {
+        console.log(`自定义数量`, customAmount)
         // 自定义数量
         const amount = parseInt(customAmount, 10);
-        if (isNaN(amount) || amount < 500) {
+        if (isNaN(amount) || amount < 0) {
           Alert.alert('Invalid Amount', 'Please enter a valid amount (minimum 500 points).');
           return;
         }
-
-        Alert.alert(
-          'Confirm purchase',
-          `You are purchasing ${amount} points.`,
-          [
-            { text: 'Cancel', style: 'cancel' },
-            {
-              text: 'Confirm',
-              onPress: () => {
-                rechargeToken(amount);
-              },
-            },
-          ]
-        );
+        rechargeToken(amount);
       }
     }
   }, [
@@ -369,7 +352,6 @@ export default function PointsExchangeScreen() {
 
                 {/* 自定义金额输入 */}
                 <View style={styles.customAmountContainer}>
-                  <Text style={styles.customAmountLabel}>Or enter custom amount:</Text>
                   <TextInput
                     style={styles.customAmountInput}
                     value={customAmount}
@@ -658,36 +640,6 @@ const styles = StyleSheet.create({
     color: screenPalette.secondaryText,
     fontWeight: '500',
   },
-  subscriptionCreditsContainer: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: 6,
-    marginBottom: 16,
-  },
-  subscriptionCredits: {
-    fontSize: 14,
-    fontWeight: '600',
-    color: screenPalette.primaryText,
-  },
-  subscriptionFeatures: {
-    gap: 8,
-  },
-  featureItem: {
-    flexDirection: 'row',
-    alignItems: 'flex-start',
-    gap: 8,
-  },
-  featureBullet: {
-    fontSize: 16,
-    color: screenPalette.accent,
-    lineHeight: 20,
-  },
-  featureText: {
-    flex: 1,
-    fontSize: 13,
-    color: screenPalette.secondaryText,
-    lineHeight: 20,
-  },
   popularBadge: {
     backgroundColor: screenPalette.button,
     paddingHorizontal: 12,
diff --git a/hooks/use-pricing.ts b/hooks/use-pricing.ts
index d8ee5a4..9c4100c 100644
--- a/hooks/use-pricing.ts
+++ b/hooks/use-pricing.ts
@@ -261,8 +261,15 @@ export function usePricing() {
       return null;
     }
 
+    // 检查 pricing data 是否加载完成
     if (!stripePricingData?.pricing_table_items?.[0]?.metered_price_id) {
-      Alert.alert('Error', 'Pricing data not available');
+      Alert.alert('Error', 'Pricing data not available. Please try again later.');
+      return null;
+    }
+
+    // 检查用户是否有 metered subscription
+    if (!meteredSubscriptions || meteredSubscriptions.length === 0 || !meteredSubscriptions[0]?.priceId) {
+      Alert.alert('Error', 'No active metered subscription found. Please contact support.');
       return null;
     }