The most common reason: your phone and TV aren't on the same network

The Roku app on your phone controls your TV by sending commands over your home WiFi network. If your phone is connected to one network and your TV is connected to a different one — or if one of them isn't connected at all — the app won't find your TV. This is the single most common cause of connection failures.

Check your phone's WiFi settings and confirm it shows the same network name (called an SSID) as the one your TV is using. You can find your TV's network in the Roku settings menu under Network. If they don't match, connect your phone to the same network your TV uses, then try opening the app again.

Key Takeaways

  • Your phone and TV must be connected to the same WiFi network for the Roku app to work — this is the cause of most connection problems.
  • Restarting both your phone and TV (by unplugging the TV for 30 seconds) fixes temporary connection glitches that happen after network changes or updates.
  • If your TV is more than 50 feet from your router or separated by multiple walls, moving the router closer or using a WiFi extender can restore the connection.
  • The Roku app requires permission to access your phone's local network, which you may need to grant manually in your phone's settings if you denied it during installation.
  • If nothing works, uninstalling and reinstalling the Roku app often fixes corrupted app data that prevents it from seeing your TV.

Your TV and phone are on the same network but still won't connect

If both devices are on the same WiFi but the app still can't find your TV, the connection between them is blocked or stalled. The fastest fix is to restart both devices. Unplug your TV from the wall outlet and leave it unplugged for 30 seconds, then plug it back in. While the TV restarts, restart your phone by powering it off and back on.

Once both devices are back online, open the Roku app again. The restart clears temporary connection problems that happen after network changes, power outages, or app updates. If the app still won't connect after a restart, move to the next step.

Your phone doesn't have permission to access your local network

The Roku app needs permission to see and communicate with devices on your home network. If you denied this permission when you first installed the app, or if your phone's settings were reset, the app can't find your TV even though both are on the same network.

On an iPhone, go to Settings > Privacy > Local Network and look for Roku. If it's toggled off, turn it on. On Android, go to Settings > Apps > Roku and tap Permissions, then make sure Local Network is allowed. After you grant permission, close the Roku app completely and open it again.

Your WiFi signal is too weak or too far away

Roku devices need a stable WiFi signal to stay connected. If your TV is more than 50 feet from your router, or if there are multiple walls or metal objects between them, the signal may be too weak for the app to reach it. You'll see this problem most often in larger homes or when the TV is in a basement or back bedroom.

Move your router closer to your TV if possible, or move your TV closer to the router temporarily to test whether signal strength is the problem. If that fixes the connection, consider a WiFi extender or mesh network system to strengthen the signal in that area. Some people also have success moving their router to a higher shelf or away from metal objects like filing cabinets.

Your Roku app is outdated or corrupted

An outdated app version or corrupted app data can prevent the Roku app from communicating with your TV. Check your phone's app store — if an update is available for the Roku app, install it. If an update doesn't fix the problem, uninstall the app completely and reinstall it fresh.

On iPhone, press and hold the Roku app icon, tap Remove App, then Remove from Home Screen. Go to the App Store, search for Roku, and tap Get to reinstall it. On Android, go to Settings > Apps > Roku, tap Uninstall, then go to the Google Play Store and search for Roku to reinstall. When you open the app after reinstalling, you may need to grant permissions again.

Your TV's network settings have changed

If your TV recently lost its connection to WiFi — because you changed your password, your router restarted, or your network name changed — the app won't be able to reach it. Check your TV's network status by going to Settings > Network > About on your Roku device. If it shows "Not connected" or displays a different network name than your phone, your TV has disconnected.

Reconnect your TV to WiFi by going to Settings > Network > Set up connection and selecting your network. You'll need to enter your WiFi password. Once your TV is back on the network, restart the Roku app on your phone and try connecting again.

Your router or internet service is having problems

Sometimes the problem isn't with your phone, TV, or app — it's with your WiFi network itself. If your internet connection is unstable or your router is malfunctioning, both devices may be on the network but unable to communicate reliably. Restart your router by unplugging it for 30 seconds, then plugging it back in. Wait two to three minutes for it to fully restart.

If restarting the router doesn't help, check whether other devices on your network (like a laptop or tablet) can connect to the internet normally. If they can't, the problem is with your internet service or router, not with your Roku setup. Contact your internet provider if the problem persists.

Frequently Asked Questions

Do I need to be on the same WiFi network as my TV to use the Roku app?

Yes. The app controls your TV by sending commands over your home WiFi network, so your phone must be connected to the same network your TV uses. If you're away from home on a different network, the app won't work unless you're using a VPN that connects you back to your home network.

What if my TV is connected to WiFi but the app still says "device not found"?

Restart both your phone and TV, then check that your phone is on the same WiFi network as your TV. If that doesn't work, go to your phone's settings and make sure the Roku app has permission to access your local network. If you still see "device not found," uninstall and reinstall the Roku app.

Can I use the Roku app if my TV is off?

No. Your TV must be powered on and connected to WiFi for the app to find it and send commands. If your TV is in standby mode (showing a black screen), it may still be connected to the network, but some Roku models require the TV to be fully on before the app can control it.

Why does the Roku app work sometimes but not other times?

Intermittent connection problems usually mean your WiFi signal is weak or unstable. Try moving your router closer to your TV, or restart your router if the problem happens repeatedly. If the app connects sometimes but fails other times, your TV may be dropping off the network when it's idle — check your router settings to see if it's disconnecting devices automatically.