diff --git a/app/src/main/kotlin/jackall/moncalc/utils/RuntimePermissionUtil.kt b/app/src/main/kotlin/jackall/moncalc/utils/RuntimePermissionUtil.kt
new file mode 100644
index 0000000..aaaa03d
--- /dev/null
+++ b/app/src/main/kotlin/jackall/moncalc/utils/RuntimePermissionUtil.kt
@@ -0,0 +1,21 @@
+package jackall.moncalc.utils
+
+import android.content.Context
+import android.os.Build
+import android.provider.Settings
+
+
+/**
+ * Created by matsumoto_k on 2017/11/06.
+ */
+class RuntimePermissionUtil {
+
+    companion object {
+        fun checkOverlayPermission(context: Context): Boolean {
+            if (Build.VERSION.SDK_INT < 23) {
+                return true
+            }
+            return Settings.canDrawOverlays(context)
+        }
+    }
+}