SlideProRelay

Put your lyrics on every phone in the room — automatically.

SlideProRelay runs on the same computer as ProPresenter 7. As you advance slides, the text appears live on any phone or tablet connected to your Wi-Fi. Nothing for your congregation to install — they just open a link in their browser.

SlideProRelay is — and will always be — free and open source.

No subscriptions. No licenses. No catch. Free forever.

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Features

• Live slide text delivered to any phone or tablet on your network
• Updates instantly as you advance slides — no refresh needed
• Works over your existing Wi-Fi — no extra hardware required
• Reconnects automatically if ProPresenter restarts
• Windows system tray app and macOS menu bar app — runs quietly in the background

Coming Soon

• Text customization — adjust font size, color, and style to suit your preferences
• Chord charts — display chords alongside lyrics for musicians
• Translations — show slide text in multiple languages simultaneously

Sponsored by SlidePro.io

SlideProRelay is proudly sponsored by SlidePro.io — a platform built for churches that want to take congregation engagement further.

Coming soon: a direct integration so ProPresenter 7 can relay slides straight to SlidePro.io, enabling cloud-based delivery, remote viewers, and more — all without leaving ProPresenter.

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Getting Started

Windows

Download and run SlideProRelay-Setup.exe. The installer adds a system tray icon, sets up your firewall automatically, and optionally starts with Windows.

macOS

Download and run SlideProRelay.pkg. The app appears as a P7 icon in your menu bar — no Dock icon. Click it to get the link to share with your congregation.

Using it

1. Open ProPresenter and enable Network in Preferences → Network
2. Launch SlideProRelay
3. Share the network URL shown (e.g. http://192.168.1.42:5174) — attendees open it in any browser

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Technical Reference

Requirements

• Windows 10+ or macOS 12+
• .NET 10 Runtime (or the SDK to build)
• ProPresenter 7 with Network enabled

ProPresenter Setup

Open ProPresenter → Preferences → Network → enable Enable Network. The port is auto-detected — you normally don't need to configure anything.

Building

Windows installer (requires Inno Setup 6):

.\installer\build.ps1
# or with a specific version:
.\installer\build.ps1 -Version 1.2.0

Output: installer\output\SlideProRelay-1.0.0-Setup.exe

macOS app (requires Xcode CLT and .NET macOS workload):

xcode-select --install
dotnet workload install macos

# Unsigned build (local use):
./installer-mac/build.sh --skip-signing

# Signed + notarized release build:
./installer-mac/build.sh --team-id YOUR_TEAM_ID --apple-id you@example.com --password xxxx-xxxx-xxxx-xxxx

Output: installer-mac/output/SlideProRelay-1.0.0.pkg

For unsigned builds, Gatekeeper will warn on first open — right-click the .pkg → Open to bypass.

Run from source:

# Windows
dotnet run --project src\SlideProRelay.Server\SlideProRelay.Server.csproj

# macOS
dotnet run --project src/SlideProRelay.Server/SlideProRelay.Server.csproj

Tests:

dotnet test

On macOS, avoid dotnet build at the repo root — the Windows tray project won't build. Build individual projects instead.

Configuration

src/SlideProRelay.Server/appsettings.json:

"ProPresenter": {
  "Host": "localhost",
  "Port": 50001,
  "PollingIntervalMs": 500,
  "AutoDetectPort": true
}

Port auto-detection is on by default — SlideProRelay reads the active port directly from ProPresenter's preferences and re-checks on reconnect, so Port is only used as a fallback.

Override any setting with an environment variable:

$env:ProPresenter__Port = "50002"
dotnet run --project src\SlideProRelay.Server\SlideProRelay.Server.csproj

API

Endpoint	Description
GET /	Live slide display (phone-friendly)
GET /events	Server-Sent Events stream
GET /api/current	Current slide as JSON
GET /api/health	Returns ok if the relay is running