Your ride, on your stream.

SlipstreamIRL is a phone app for cyclists who stream. It takes your location and your bike sensors and turns them into overlays you drop straight into OBS — a moving map that follows you, and a bike-computer readout beside it.

It runs in your pocket with the screen off, so your phone is a sensor hub rather than something you have to babysit mid-ride.

What your viewers see

• A live map that rotates the way you're heading, with your route drawn behind you.
• Speed, distance, power, cadence and heart rate — coloured by how hard you're working.
• Wind direction on the map, so the headwind you're complaining about is visible.
• Rear radar — approaching cars, if you ride with a Garmin Varia.

What it does for you

• Reads your chat aloud through a headset, so you can talk to people without looking down.
• Starts and ends your stream from chat commands, so you're not stopping to fiddle with a laptop.
• Dictate your ride plan before you set off and it becomes your stream title.
• Watches your encoder's bitrate so you can see connection trouble coming.
• Hides your location near home — set a radius and the map shows a question mark instead.

What you'll need

Getting started

1. Install the app and sign in with Twitch. That's the only account you need.
2. Copy your overlay links from the app and paste them into OBS as browser sources.
3. Pair your sensors if you have them — the app finds them and reconnects on its own if one drops out.
4. Ride. Lock your phone and put it in your pocket; everything keeps running.

Where the overlays come from

Your phone sends its data to a small server called a relay, which is what OBS actually connects to. You have two ways to get one:

• Hosted — sign in and it's handled for you. Nothing to set up, nothing to run.
• Self-hosted — the relay is open source and free to run yourself, if you'd rather own it end to end.