If you see a “No Devices Found” message on the “Select a Player” screen, your Roku player was not detected over your network. 

First, try going through Network setup to ensure your Roku player is visible (“awake”) on your home network:

• Roku 3 & Roku 2 XS:  Go to Settings > Network and select either Wireless or Wired (Ethernet).
• Roku 2 XD, Roku 2 HD & Roku LT:  Go to Settings > Network and select either Wireless.
• First-generation Roku players:  Go to Settings > Network > Repeat guided setup.

After you have successfully reconnected to your network, tap “Refresh List” on the Roku iPhone app a few times.

 If the app still does not show your Roku player, try powering down your Roku player, iPhone and router. Restart all devices, wait 3 minutes, then launch the Roku iPhone app again.

 Finally, confirm your Roku player is on the same network as your iPhone:

1. On your iPhone, open Settings and check your network's IP address. Go to Settings > Wi-Fi > Your network name and write down the number next to "IP Address". Your IP address will be a four-part number (e.g. 10.3.4.125).
2. Now, check the IP address of your Roku player. Go to Settings > About from Roku 2 and Roku LT players. Go to Settings > Player info from original Roku players. Write down the number next to “IP Address.”
3. The first three of four numbers of the IP address of your iPhone and your Roku player should match (e.g. 10.3.4 from IP address 10.3.4.125). If these numbers do not match, your Roku player and iPhone are not on the same network.

If the IP address numbers do not match, your iPhone and Roku player are not on the same network. Try the following:

• If your Roku player is connected via Wi-Fi, check that your iPhone and Roku player aren’t accidentally connected to a neighbor’s Wi-Fi network.
• If your Roku player is connected via Ethernet, connect it wirelessly to the same Wi-Fi network as your iPhone. Go through Wi-Fi setup on your Roku player by selecting Settings > Network. Have your network password ready.
• If you are using a combination cable modem/wireless router, try adding a separate wireless router to your network and connecting your Roku player and iPhone to it.
• If you have multiple wireless routers in your home, check that your Roku player and iPhone are connected to the same router (same SSID).

Finally, it’s possible you have an incompatible router or a network configuration issue. Try contacting Roku Support here for more help. Be ready to provide them with details about the issue, your router make/model, your Roku player model and your Roku software version.