SyncFlowBoard

Local Stage Intercom & Canvas

Free · Designed for iPad. Not verified for macOS.

SyncFlow is a local, real-time shared communication app designed specifically for stage crews, live event production, PA engineers, and lighting operators. By connecting devices locally, SyncFlow enables instant text announcements and hand-drawn diagrams between backstage, front-of-house (FOH), and the stage. No internet required—keep your team perfectly coordinated even in deep basements or remote venues. ◆ Key Features ◆ • Instant Shared Canvas Draw, write, and map out stage layouts with up to 8 devices simultaneously. Your drawings sync in real time with ultra-low latency. Perfect for conveying visual information (like mic placements, staging modifications, or quick cues) without speaking. • Full-Screen Message Board Need to display the current schedule or critical alerts? Instantly toggle a full-screen, high-contrast Message Board. Put up notices like "18:00 OPEN" or "CLOSE" with custom fonts, colors, a built-in real-time clock, and a vibrant Neon mode for maximum visibility in dark backstage areas. • Professional Power Saving Designed to survive grueling rehearsals and long live shows. When the Message Board is closed, background clock updates and neon animations are suspended 100% (Eco-Sleep mode). This prevents iPad overheating and drastically reduces battery drain. • Robust Offline Sync Running on Apple’s secure local networking, SyncFlow works completely offline. Simply connect both iPads to the same local Wi-Fi router. Experience rock-solid, low-latency synchronization across 100+ meters, free from the packet congestion of busy venue networks. • Smart Display Names Bypass standard system name limitations. Customize your display name so other devices can instantly recognize who sent a drawing or who is currently online in the connection logs. Elevate your backstage communication. Run your next show seamlessly with SyncFlow.

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Latest Build Information (v1.4 / Build 5) [New Features & Enhancements] Always-On User Name Display: Added a small user device name display in the top-left corner of the canvas. It is placed on the top-most layer, so it won't be erased by the Apple Pencil or eraser. Name Imprint on Screenshots: The user's device name is now properly captured and baked into the image when saving a screenshot via the camera button. [Bug Fixes & Stability Improvements] Touch Blocking Fix: Fixed an issue where the new name display layer intercepted touch events, rendering the canvas unresponsive to drawing. Startup Crash Fix: Fixed an immediate crash upon launch caused by iOS privacy restrictions by adding the missing NSLocalNetworkUsageDescription and UDP protocol configurations to Info.plist. Idle Timer Crash Fix: Resolved an issue where the app would crash after 30–50 seconds of being idle (_CFAssertMismatchedTypeID CFNetwork bug). The background network discovery timer (running every 12 seconds) now properly re-instantiates the Multipeer browser and advertiser, ensuring rock-solid stability even when running standalone for long periods.

The developer, SUGAR SOUND, K.K., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • SUGAR SOUND, K.K.
    Size
    • 5 MB
    Category
    • Entertainment
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • iPad
      Requires iPadOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    • English and Japanese
    Age Rating
    4+
    Copyright
    • © 2026 Sugar Sound