Local multiplayer.
Shared over the internet.

Play together

• Any game: works with whatever is on the host's screen; no game support needed.
• Friends' controllers become local players: the host's games see each friend's controller as

a controller plugged into the host (Xbox, DualShock 4 or DualSense, chosen automatically or by hand). The host keeps playing with their own.

• Keyboard and mouse too, from a Windows guest.
• More than one friend can join the same host.

Looks and feels live

• No buffering: every frame is sent the moment it is ready and shown the moment it arrives.
• Automatic quality: adapts the picture to each friend's connection, and recovers quickly after

a rough moment. Favor frame rate (up to each friend's screen refresh rate) or a sharper picture.

• Sharp picture: uses your graphics card's video hardware (H.264 or HEVC, picked

automatically). On a wired home network, PyroWave gives a near-lossless picture.

• Fills the screen: black bars around a game's picture (for example a 16:9 game on a 16:10

handheld) are cropped away for friends.

• Sound included, in high quality.
• Performance overlay: see the stream's frame rate, bitrate and the delay of each step while

you play, on Windows or a handheld.

• Manual stream settings: turn off automatic optimization to choose the resolution, frame

rate, bitrate and video codec yourself. Available options include 4K and 120 fps; what runs smoothly depends on the devices and connection.

• Host frame-rate limit: set a cap before sharing to control how many frames the host streams.

Connects simply and safely

• Pair once with a PIN shown on the host's screen; afterwards, just join.
• You decide who joins: the host allows each new device, and a few wrong PINs pause pairing,

so nobody can guess their way in.

• Home network, VPN or internet: friends on your network or a VPN just

connect; over the internet, the app can open its port on your router (UPnP) or you forward one port by hand.

• Everything encrypted, through a single port.
• Direct, private connections: no accounts or relay servers between players; game streams travel

directly between your devices.

• Updates in one click: the app tells you when a new version is out, then downloads it, checks

that it is genuine and installs it.

• Automatic router setup with UPnP: on a compatible router, open the port for internet play

from CouchRelay. The app removes the port mapping when you stop sharing.

• VPN compatibility: connect using your friend's VPN address when the VPN lets your devices

reach each other. This also gives connections behind carrier-grade NAT a way to play together.

• Recent hosts: reconnect from the list of hosts you have joined before instead of typing

the address again.

• Manage paired friends: remove a paired device from the host when you no longer want it

to have access.

Made for handhelds too

• Decky plugin for SteamOS, Bazzite and CachyOS Handheld: host or join from Gaming Mode, with

Steam Input mapping your controls.

• Stay awake while sharing, so friends can join later; optionally dims the screen and

mutes the speakers when nobody is touching the handheld (friends still see and hear the game).

• Keeps Wi-Fi steady during a stream (no power saving or access point hopping mid-game).
• End stream from the Quick Access menu.

On Windows

• One portable app: unzip and run, no installer. The virtual controller driver is installed on

first host, with your permission, and removed again from Settings.

• Settings lock during a stream so nothing changes mid-game.