diff --git a/etc/systemd/system/README.md b/etc/systemd/system/README.md
index aacd0085..acefdb34 100644
--- a/etc/systemd/system/README.md
+++ b/etc/systemd/system/README.md
@@ -1,5 +1,7 @@
-The IPv6 files are copied from https://www.reddit.com/r/raspberry_pi/comments/14vcpz/rpi_as_an_ipv6_router_using_a_sixxs_tunnel_and/
-an they are here because they were my biggest difficulty with having
+* The IPv6 files are copied from https://www.reddit.com/r/raspberry_pi/comments/14vcpz/rpi_as_an_ipv6_router_using_a_sixxs_tunnel_and/
+  and they are here because they were my biggest difficulty with having
 Arch on Pi as IPv6 router.
-
-Also helpful https://wiki.archlinux.org/index.php/IPv6_tunnel_broker_setup
+    * Also helpful
+      https://wiki.archlinux.org/index.php/IPv6_tunnel_broker_setup
+* ydns-simple.\* are for https://github.com/Mikaela/scripts/blob/gh-pages/bash/ydns-simple and I am just curious and want to avoid installing cron to
+  my phone.
diff --git a/etc/systemd/system/ydns-simple.service b/etc/systemd/system/ydns-simple.service
new file mode 100644
index 00000000..f00218e4
--- /dev/null
+++ b/etc/systemd/system/ydns-simple.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=ydns-simple service
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/ydns-simple
+
+[Install]
+WantedBy=ydns-simple.timer
diff --git a/etc/systemd/system/ydns-simple.timer b/etc/systemd/system/ydns-simple.timer
new file mode 100644
index 00000000..703639e6
--- /dev/null
+++ b/etc/systemd/system/ydns-simple.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Run ydns-simple every 5 minutes
+
+[Timer]
+OnBootSec=1min
+OnUnitActiveSec=5min
+
+[Install]
+WantedBy=timers.target