How to Use Your iPad as a Second Monitor in 2026

Using a second monitor can boost your productivity by up to 30%, but buying a dedicated external display isn't always practical — especially if you already own an iPad. The good news is that several apps let you turn your iPad into a fully functional second screen.

In this guide, we'll walk you through every method available in 2026, from Apple's built-in Sidecar to free open-source alternatives like BetterCast.

Why Use Your iPad as a Second Monitor?

Most people already own an iPad. Instead of letting it sit idle, you can use it as a portable second display. Here's why it makes sense:

• Save money — No need to buy a dedicated portable monitor ($200–$400)
• Portability — Your iPad is lighter than any external display
• Touch input — Some apps let you interact directly with content on the extended screen
• Retina quality — Modern iPads have displays that rival or exceed many monitors

Method 1: Apple Sidecar (Free, Apple Only)

If you own a Mac and an iPad, Sidecar is the easiest option. It's built directly into macOS and iPadOS — no extra software needed.

Requirements:

• macOS Catalina or later
• iPadOS 13 or later
• Both devices signed into the same Apple ID
• Same Wi-Fi network or USB connection

Pros: Zero setup, native Apple Pencil support, no lag over USB.

Cons: Apple ecosystem only — no Windows, no Linux, no Android. Limited to one iPad. Requires relatively recent hardware (2016 MacBook Pro or later).

Method 2: Duet Display ($4–6/month)

Duet Display was one of the first apps to solve this problem and is built by former Apple engineers. It supports both USB and wireless connections and works across Mac, Windows, iOS, and Android.

Pros: Cross-platform, Apple Pencil support, remote desktop capability.

Cons: Requires a monthly subscription ($4–6/month). Users report lag on wireless connections. Has had reliability issues when licensing servers go down.

Method 3: Luna Display ($120 One-Time)

Luna Display by Astropad takes a hardware approach — you plug a small dongle into your Mac, and it creates a hardware-accelerated second display connection to your iPad.

Pros: Excellent performance (16ms latency), 5K at 60Hz, no subscription.

Cons: Mac-only (no Windows host), requires the hardware dongle, $120+ upfront cost.

Method 4: Spacedesk (Free, Windows Only)

Spacedesk is a free option for Windows users that supports iOS, Android, and browser-based clients.

Pros: Completely free for personal use, supports multiple simultaneous displays.

Cons: Windows-only as the host machine — no macOS or Linux support. Commercial use requires a paid license.

Method 5: BetterCast (Free, All Platforms)

BetterCast is a free, open-source second display application that works across all major platforms — macOS, Windows, Linux, iOS, and Android.

What sets BetterCast apart:

• Truly free — No subscription, no one-time fee, no feature gates
• Cross-platform — Works with every major operating system
• Ultra-low latency — 0.02ms peer-to-peer streaming over your local network
• 60 FPS at 4K/Retina resolution
• No account needed — No cloud servers, no sign-up. Direct P2P connection
• Tiny footprint — Just 3MB install size
• Open source — GPL 3.0 licensed, fully transparent

How to set up BetterCast with your iPad:

1. Download BetterCast on your computer from the official site
2. Install the BetterCast client on your iPad
3. Connect both devices to the same local network
4. Launch BetterCast on both devices — they'll discover each other automatically
5. Start using your iPad as a second screen

Comparison Table

Which Should You Choose?

• Apple-only setup? Start with Sidecar — it's free and built in
• Windows + iPad? BetterCast or Spacedesk are your best free options
• Cross-platform needs? BetterCast is the only free option that covers all platforms
• Budget is no concern? Luna Display offers excellent hardware-accelerated performance

For most users, BetterCast offers the best combination of platform support, performance, and price — because it's completely free and open source.