Free & Open Source · No Account Required
Turn any device into
a second display.
For free.
BetterCast is a free, open-source second display app that turns any iPad, Android tablet, phone, or laptop into an extended monitor for your Mac. It streams at 60 FPS with 0.02ms latency over a direct peer-to-peer connection — no account, no cloud, no subscription.
Why BetterCast
Everything paid second monitor apps charge for — free.
0.02ms
Latency
Hardware-accelerated pipeline delivers frames faster than you can perceive.
60FPS
Refresh Rate
Smooth, tear-free rendering at full display refresh rate over USB-C or Wi-Fi 6.
4K
Resolution
Full Retina and HiDPI support. Every pixel rendered at native resolution.
Unlimited
Virtual Screens
Create secondary, third, and more virtual displays to expand your workspace as needed.
$0
Completely Free
Every feature included for everyone. No subscriptions, no feature gates, no trials. Pay what you want if you'd like to support us.
3MB
Install Size
Minimal footprint. No background daemons, no telemetry, no bloat.
5+
Platforms
macOS sender with receivers on Windows, Linux, iOS, and Android. One protocol across every device.
P2P
Direct Connection
Peer-to-peer streaming. Your devices communicate directly without relay servers.
Open Source
Contributions Welcome
Built by the community. PRs, issues, and ideas welcome. Help shape the future.
Who's This For
Built for Mac users who need more screen space.
Your Mac is the sender. Everything else becomes an extra display — your iPad, phone, spare laptop, or any device with a screen.
Developers
Code on your Mac, debug on a second screen. Keep docs, terminals, or browser devtools always visible.
Designers
Preview your work on a real device while editing on your Mac. Perfect for responsive design testing.
Streamers & Creators
Use a tablet as a dedicated chat monitor, OBS preview, or camera feed while streaming from your Mac.
Remote Workers
Turn your iPad or spare laptop into a second monitor for video calls, Slack, or project management.
Students
Follow along with lectures on one screen while taking notes on another — no extra monitor needed.
Musicians & DJs
Keep your mixer, DAW controls, or setlist visible on a second device while performing on your Mac.
Use Cases
One app, dozens of setups.
Extend or mirror your Mac to any device — iPad, iPhone, Android, Windows, or Linux. Android screen mirroring also supported.
Extend
Extend your Mac display to an iPad, Android tablet, or any device as a seamless second screen.
Mirror
Mirror your Mac's display for presentations, streaming, or debugging on a second screen.
Android Mirror
Mirror your Android screen to your Mac — great for demos, testing, or presentations.
Desktop to Desktop
Turn a spare PC or Linux machine into a lag-free secondary monitor for your Mac.
Wi-Fi 6 Ready
Wireless display extension at wired speeds. No cables required.
USB-C Native
Direct connection for the absolute lowest latency possible.
How It Works
Up and running in under a minute.
No sign-ups, no configuration, no drivers. Just install and connect.
Install on your Mac
Download the .dmg and install BetterCast. It includes both the sender and receiver — so your Mac can extend its display or receive from another Mac.
Install receivers on your other devices
Download the receiver on any device you want to use as an extra screen — another Mac, iPad, iPhone, Android, Windows PC, or Linux machine.
Connect to the same network
Make sure both devices are on the same Wi-Fi network or connected via USB-C. Open the sender on your Mac and the receiver on the other device.
That's it — you're live
Your second display appears automatically. Drag windows across, extend your workspace, or mirror your screen. No accounts, no pairing codes.
Pricing
100% free. Every feature. No catch.
Other apps charge $4/mo for what BetterCast gives you for free. Every feature is unlocked from day one — no upgrade walls.
FAQ