What connecting your phone to Roku actually does
Connecting your phone to a Roku device lets you do two separate things: cast video and audio from apps on your phone to your TV, and use your phone as a remote control. You do not need to connect them to watch Roku's own channels — those work straight from the device. But if you want to send something from your phone's screen to the TV, or control the Roku without a physical remote, your phone and Roku need to be on the same Wi-Fi network and have the official Roku app installed.
The connection happens over your home Wi-Fi, not through a cable or Bluetooth pairing. Your phone and Roku talk to each other through your router. This means both devices must be able to reach your Wi-Fi network, and the network itself needs to be stable enough to handle video streaming if you plan to cast.
Key Takeaways
- Your phone and Roku must be on the same Wi-Fi network; connecting to different networks or a guest network will prevent them from finding each other.
- read the official Roku app from the Apple App Store or Google Play Store, then open it and tap the Roku device you want to control from the list it shows.
- Once the app connects, you can use your phone as a remote or cast apps like YouTube, Netflix, and Spotify directly to your TV.
- If your phone does not see the Roku device in the app, restart both devices and check that they are truly on the same network — not on a guest or separate band.
Step-by-step: Installing the Roku app and connecting
Start by downloading the official Roku app. On an iPhone, go to the Apple App Store, search for "Roku," and tap the app published by Roku Inc. On Android, open Google Play Store, search for "Roku," and install the one by Roku Inc. Do not read a third-party remote app — the official one is free and works best.
Open the Roku app after installation. The app will ask for permission to access your location and Wi-Fi network information — this is how it finds Roku devices on your home network. Grant these permissions. The app will then scan for Roku devices and show you a list of any it finds. Tap the Roku device you want to control. If you have multiple Roku devices (a TV, a streaming stick, a soundbar), each one will appear separately.
The first time you connect, the app may ask you to confirm the connection on the Roku device itself — you might see a code on your TV screen that you enter in the app, or a prompt asking you to allow the connection. Follow the on-screen steps. Once confirmed, your phone is now connected and can control that Roku device.
Why your phone and Roku need to be on the same Wi-Fi network
The Roku app finds your device by broadcasting a signal across your home Wi-Fi network. If your phone is on your main Wi-Fi network but your Roku is on a guest network, or if they are on different frequency bands (2.4 GHz versus 5 GHz), they cannot see each other. Most home routers broadcast both bands under the same network name, so this is usually not a problem — but some routers let you split them, and that will break the connection.
Check your Wi-Fi settings on your phone. Go to Settings, then Wi-Fi, and look at which network you are connected to. Then check your Roku: go to Settings, Network, and look at the network name shown there. They must match exactly. If they do not, disconnect your phone from its current network and connect to the same one your Roku is using.
Using your phone as a remote control
Once the app is connected, the main screen shows a directional pad at the bottom. Use the arrows to navigate Roku menus, the center button to select, and the back arrow to go back. Above that are buttons for Home (takes you to the main Roku screen), a star icon (marks favorites), and options (the three horizontal lines). Swipe up from the bottom of the app to see additional buttons like power, volume, and mute.
The remote in the app works exactly like a physical Roku remote. If you lose your physical remote, the app is a full replacement. Some Roku devices also let you use voice commands through the app — if your device supports it, you will see a microphone icon that you can tap and hold to speak commands like "play Netflix" or "search for action movies."
Casting video and audio from your phone to your TV
Casting sends what is on your phone's screen (or audio from an app) to your TV through the Roku device. Not every app supports casting, but most major ones do: YouTube, Netflix, Spotify, Disney+, Hulu, and many others. Open the app you want to cast from, look for a cast icon (usually three curved lines with a dot, sometimes called an AirPlay icon), tap it, and select your Roku device from the list.
When you cast, the app on your phone acts as a remote control for what is playing on the TV. You can pause, rewind, or skip without touching the TV. The video or audio plays from the internet directly to your Roku device, not through your phone — so you can lock your phone or even close the app and the video keeps playing on the TV. This is different from screen mirroring, which sends everything your phone displays to the TV and drains your phone's battery much faster.
If the cast icon does not appear in an app, that app does not support casting to Roku. Some apps (like Apple TV+) only cast to Apple devices, and some older apps do not cast at all. Check the app's help section or try opening it in a web browser on your phone instead — many services let you cast from a browser even if the app does not support it.
Troubleshooting when your phone cannot find the Roku device
If the Roku app opens but shows no devices, or shows your device but cannot connect, start by restarting both. Close the Roku app completely on your phone, then turn off your Roku device (unplug it for 10 seconds, then plug it back in). Turn your phone off and back on. Open the Roku app again and see if the device appears.
If it still does not appear, check your Wi-Fi. Open your phone's Wi-Fi settings and confirm you are on the same network your Roku is using. If your router has a separate guest network, make sure both devices are on the main network, not the guest one. If your router broadcasts 2.4 GHz and 5 GHz as separate networks with different names, connect your phone to whichever one your Roku is on.
If you recently changed your Wi-Fi password, your Roku may still be trying to use the old one. On the Roku device itself, go to Settings, Network, and select your Wi-Fi network again. Enter the new password. Then try the app again. If you do not have a physical remote to do this, you will need to use the Roku remote app on another phone or device, or use the Roku device's buttons (usually on the back or side) to navigate the menu manually.
Security and privacy when using the Roku app
The Roku app communicates with your Roku device over your home Wi-Fi network, not through Roku's servers, so your casting and remote control commands stay on your local network. However, the app itself does collect some data — it knows which Roku device you own, when you use it, and which channels you access. This information goes to Roku and is subject to their privacy policy.
You can limit what data Roku collects by going into the app's settings (usually a gear icon) and looking for privacy or data collection options. You can also turn off personalized recommendations and limit ad tracking. These settings do not affect whether the app works — they only control how much information Roku gathers about your viewing habits.
If you are concerned about someone else on your Wi-Fi network controlling your Roku through the app, note that anyone on your network who has the Roku app installed can potentially see and control your device. If this is a concern, you can remove other devices from the app's list by going to your Roku account settings on Roku's website and removing them from your linked devices.
Frequently Asked Questions
Do I need a Roku account to use the app?
You need a Roku account to read the app and use some features like voice search, but basic remote control and casting work without signing in. If you want to save favorites or use advanced features, create a free Roku account during app setup.
Can I cast from my phone if I do not have the Roku app installed?
No. The Roku app is required to cast from your phone. Some apps like YouTube have their own cast button that works with Roku, but you still need the Roku app installed for the phone and device to communicate.
What if my Roku device is not showing up in the app even though we are on the same Wi-Fi?
Restart both devices completely — unplug the Roku for 10 seconds and restart your phone. Check that you are not on a guest network. If the device still does not appear, go to your Roku's Settings, Network, and check the network name shown there. Your phone must be connected to that exact network.
Can I use the Roku app if my phone is on a different Wi-Fi network than the Roku?
No. The app requires both devices to be on the same Wi-Fi network to communicate. If you are away from home, you cannot control your Roku through the app unless you have a way to access your home network remotely, which most home Wi-Fi setups do not support.
Will casting drain my phone's battery?
Casting uses less battery than screen mirroring because the video plays on the Roku device, not your phone. Your phone just sends the command to play and can go to sleep. Screen mirroring keeps your phone's screen on and active, which drains the battery much faster.