diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/utils/ServiceUtil.kt b/app/src/main/kotlin/jackall/overlaymulticounter/utils/ServiceUtil.kt
new file mode 100644
index 0000000..5a81385
--- /dev/null
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/utils/ServiceUtil.kt
@@ -0,0 +1,22 @@
+package jackall.overlaymulticounter.utils
+
+import android.app.ActivityManager
+import android.content.Context
+import jackall.overlaymulticounter.service.MainService
+
+/**
+ * Created by matsumoto_k on 2017/11/10.
+ */
+class ServiceUtil {
+    companion object {
+        fun isMainServiceRunning(context: Context): Boolean {
+            val manager = context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
+            for (serviceInfo in manager.getRunningServices(Integer.MAX_VALUE)) {
+                if (MainService::class.java.getName() == serviceInfo.service.className) {
+                    return true
+                }
+            }
+            return false
+        }
+    }
+}
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