diff --git a/appstore/subscription.go b/appstore/notification.go
similarity index 100%
rename from appstore/subscription.go
rename to appstore/notification.go
diff --git a/playstore/notification.go b/playstore/notification.go
new file mode 100644
index 0000000..583559b
--- /dev/null
+++ b/playstore/notification.go
@@ -0,0 +1,33 @@
+package playstore
+
+// DeveloperNotification is sent by a Pub/Sub topic.
+// Detailed description is following.
+// https://developer.android.com/google/play/billing/realtime_developer_notifications.html#json_specification
+type DeveloperNotification struct {
+	Version                  string                   `json:"version"`
+	PackageName              string                   `json:"packageName"`
+	EventTimeMillis          string                   `json:"eventTimeMillis"`
+	SubscriptionNotification SubscriptionNotification `json:"subscriptionNotification,omitempty"`
+	TestNotification         SubscriptionNotification `json:"testNotification,omitempty"`
+}
+
+// SubscriptionNotification has subscription status as notificationType, toke and subscription id
+// to confirm status by calling Google Android Publisher API.
+type SubscriptionNotification struct {
+	Version          string           `json:"version"`
+	NotificationType NotificationType `json:"notificationType,omitempty"`
+	PurchaseToken    string           `json:"purchaseToken,omitempty"`
+	SubscriptionID   string           `json:"subscriptionId,omitempty"`
+}
+
+type NotificationType int
+
+const (
+	NotificationTypeRecovered NotificationType = iota + 1
+	NotificationTypeRenewed
+	NotificationTypeCanceled
+	NotificationTypePurchased
+	NotificationTypeAccountHold
+	NotificationTypeGracePeriod
+	NotificationTypeReactivated
+)