diff --git a/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java b/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
index cf04f33..842779e 100644
--- a/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
+++ b/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
@@ -2,8 +2,11 @@ package com.miti99.storescraperbot.api.apple;
 
 import com.miti99.storescraperbot.api.apple.request.AppleAppRequest;
 import com.miti99.storescraperbot.api.apple.response.AppleAppResponse;
+import com.miti99.storescraperbot.constant.Constant;
+import com.miti99.storescraperbot.model.AppleApp;
 import com.miti99.storescraperbot.repository.AppleAppRepository;
 import com.miti99.storescraperbot.util.GsonUtil;
+import com.miti99.storescraperbot.util.Time;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpClient.Redirect;
@@ -51,18 +54,23 @@ public class AppStoreScraper {
   }
 
   public static AppleAppResponse getAppResponse(String appId, String country) {
-    boolean isInCache = AppleAppRepository.INSTANCE.exist(appId);
-    if (isInCache) {
-      var app = AppleAppRepository.INSTANCE.load(appId);
-      return app.getApp();
-    } else {
+    long now = Time.currentTimeMillis();
+    AppleApp app = null;
+    if (AppleAppRepository.INSTANCE.exist(appId)) {
+      app = AppleAppRepository.INSTANCE.load(appId);
+      if (now - app.getMillis() > Constant.APP_CACHE_MILLIS) {
+        app = null;
+      }
+    }
+    if (app == null) {
       var response = app(new AppleAppRequest(appId, country));
       AppleAppRepository.INSTANCE.init(appId);
-      var app = AppleAppRepository.INSTANCE.load(appId);
+      app = AppleAppRepository.INSTANCE.load(appId);
       app.setApp(response);
+      app.setMillis(now);
       AppleAppRepository.INSTANCE.save(appId, app);
-      return response;
     }
+    return app.getApp();
   }
 
   public static LocalDate getAppUpdated(String appId, String country) {
diff --git a/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java b/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
index c33a268..f191e63 100644
--- a/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
+++ b/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
@@ -2,8 +2,11 @@ package com.miti99.storescraperbot.api.google;
 
 import com.miti99.storescraperbot.api.google.request.GoogleAppRequest;
 import com.miti99.storescraperbot.api.google.response.GoogleAppResponse;
+import com.miti99.storescraperbot.constant.Constant;
+import com.miti99.storescraperbot.model.GoogleApp;
 import com.miti99.storescraperbot.repository.GoogleAppRepository;
 import com.miti99.storescraperbot.util.GsonUtil;
+import com.miti99.storescraperbot.util.Time;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpClient.Redirect;
@@ -50,18 +53,23 @@ public class GooglePlayScraper {
   }
 
   private static GoogleAppResponse getAppResponse(String appId, String country) {
-    boolean isInCache = GoogleAppRepository.INSTANCE.exist(appId);
-    if (isInCache) {
-      var app = GoogleAppRepository.INSTANCE.load(appId);
-      return app.getApp();
-    } else {
+    long now = Time.currentTimeMillis();
+    GoogleApp app = null;
+    if (GoogleAppRepository.INSTANCE.exist(appId)) {
+      app = GoogleAppRepository.INSTANCE.load(appId);
+      if (now - app.getMillis() > Constant.APP_CACHE_MILLIS) {
+        app = null;
+      }
+    }
+    if (app == null) {
       var response = app(new GoogleAppRequest(appId, country));
       GoogleAppRepository.INSTANCE.init(appId);
-      var app = GoogleAppRepository.INSTANCE.load(appId);
+      app = GoogleAppRepository.INSTANCE.load(appId);
       app.setApp(response);
+      app.setMillis(now);
       GoogleAppRepository.INSTANCE.save(appId, app);
-      return response;
     }
+    return app.getApp();
   }
 
   public static LocalDate getLastUpdateOfApp(String appId, String country) {
diff --git a/src/main/java/com/miti99/storescraperbot/constant/Constant.java b/src/main/java/com/miti99/storescraperbot/constant/Constant.java
index 0a7ebdc..0b8cad5 100644
--- a/src/main/java/com/miti99/storescraperbot/constant/Constant.java
+++ b/src/main/java/com/miti99/storescraperbot/constant/Constant.java
@@ -8,6 +8,7 @@ import java.util.Set;
 
 public class Constant {
   public static final long APP_CACHE_SECONDS = 600;
+  public static final long APP_CACHE_MILLIS = APP_CACHE_SECONDS * 1000;
   public static final long NUM_DAYS_WARNING_NOT_UPDATED = 30;
   public static final LocalTime SCHEDULE_CHECK_APP_TIME = LocalTime.of(7, 0);
 
diff --git a/src/main/java/com/miti99/storescraperbot/model/AppleApp.java b/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
index 6f5b5b2..7c9b2e3 100644
--- a/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
+++ b/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
@@ -8,5 +8,5 @@ import lombok.Setter;
 @Setter
 public class AppleApp extends AbstractModel {
   AppleAppResponse app;
-  long millis; // TODO: handle expire
+  long millis;
 }
diff --git a/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java b/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
index 97473af..a2d8fcc 100644
--- a/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
+++ b/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
@@ -8,5 +8,5 @@ import lombok.Setter;
 @Setter
 public class GoogleApp extends AbstractModel {
   GoogleAppResponse app;
-  long millis; // TODO: handle expire
+  long millis;
 }
diff --git a/src/main/java/com/miti99/storescraperbot/util/Time.java b/src/main/java/com/miti99/storescraperbot/util/Time.java
new file mode 100644
index 0000000..72a4369
--- /dev/null
+++ b/src/main/java/com/miti99/storescraperbot/util/Time.java
@@ -0,0 +1,57 @@
+package com.miti99.storescraperbot.util;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.OffsetDateTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.TimeZone;
+
+public class Time {
+  private static final TimeZone TIME_ZONE = TimeZone.getDefault();
+  private static final ZoneId ZONE_ID = TIME_ZONE.toZoneId();
+  private static long deltaMillis = 0L;
+
+  public static LocalDate currentDate() {
+    return LocalDate.ofInstant(currentInstant(), ZONE_ID);
+  }
+
+  public static LocalTime currentTime() {
+    return LocalTime.ofInstant(currentInstant(), ZONE_ID);
+  }
+
+  public static LocalDateTime currentDateTime() {
+    return LocalDateTime.ofInstant(currentInstant(), ZONE_ID);
+  }
+
+  public static OffsetDateTime currentOffsetDateTime() {
+    return OffsetDateTime.ofInstant(currentInstant(), ZONE_ID);
+  }
+
+  public static ZonedDateTime currentZonedDateTime() {
+    return ZonedDateTime.ofInstant(currentInstant(), ZONE_ID);
+  }
+
+  public static Instant currentInstant() {
+    return Instant.ofEpochMilli(currentTimeMillis());
+  }
+
+  public static long currentTimeMillis() {
+    return System.currentTimeMillis() + deltaMillis;
+  }
+
+  public static void useMockTime(LocalDateTime dateTime, ZoneId zoneId) {
+    deltaMillis = dateTime.atZone(zoneId).toInstant().toEpochMilli() - System.currentTimeMillis();
+  }
+
+  public static void useSystemDefaultZoneClock() {
+    deltaMillis = 0L;
+  }
+
+  private static Clock getClock() {
+    return Clock.fixed(currentInstant(), ZONE_ID);
+  }
+}