# SyncFlowBoard — Local Stage Intercom & Canvas > Local Stage Intercom & Canvas (iPhone/iPad app by SUGAR SOUND, K.K..) - Source: https://appshunter.io/ios/app/syncflowboard/id6745395365 (this page in markdown: same URL + `.md`) - Developer: [SUGAR SOUND, K.K.](https://appshunter.io/developer/1811951231) - Category: Entertainment, Productivity - Price: Free - Age rating: 4+ - Requires: iOS 17.6 · 5 MB - Languages: English, Japanese - Released: 2026-05-29 - Data updated: 2026-08-08 - User reviews in markdown: https://appshunter.io/ios/app/syncflowboard/id6745395365/reviews.md ## What is SyncFlowBoard? 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. ## Version history (last 5 releases) ### 1.6 — 2026-08-03 What's New in the Latest Version Thank you for using SyncFlow! In this update, based on user feedback, we have added new features to improve your drawing experience: New Pen Sizes Added: We have added two new ultra-fine pen sizes, "SS" and "SSS", to the drawing tools. This allows for much more delicate, precise, and detailed writing and sketching. We hope you continue to enjoy a smooth and seamless syncing experience! ### 1.5 — 2026-06-15 Connection Management Fix: Fixed an issue where multiple devices with the exact same name (e.g., two devices named "iPad") on the same network would successfully sync in the background but fail to be accurately counted in the active connections list on the screen. Improved internal peer-to-peer connectivity stability for a smoother synchronization experience. ### 1.4 — 2026-06-07 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. ### 1.3 — 2026-06-02 Bug Fixes: Resolved a critical issue where the app would crash on startup when no other devices were available for connection. The connection alert now pulses smoothly without causing layout instability. Pen Size Improvements: Refined the drawing tools by introducing a brand-new "Super Thin" pen size, and recalibrated the "MAX" thickness for a more balanced and comfortable writing experience. ### 1.2 — 2026-06-01 【What's New in Version 1.2】 Thank you for using SyncFlow! In this update, we've significantly improved usability and performance based on your feedback. ・ New Features & UI Improvements Maximized Canvas: Redesigned the toolbar layout by consolidating all tools into a single, horizontally scrollable row at the top. This maximizes your drawing area, especially on smaller devices like the iPhone. Save Your Preferences: The app now remembers your last used pen color and thickness, automatically restoring them the next time you open the app. (Default is set to Yellow, size M). Enhanced Info Board: Text size now scales dynamically based on the character count. We've also added a glowing "Neon Effect" feature for when you really want your message to stand out! ・ Drastic Performance Boost Ultra-Fast Drawing Sync: We completely overhauled the internal syncing and merging algorithms. Even with incredibly complex drawings and multiple connected devices, syncing is now lightning-fast, buttery smooth, and completely lag-free. Improved the stability of the "Erase All" synchronization and fixed various minor bugs for a lighter, more reliable experience. ## More apps by SUGAR SOUND, K.K. - [ScanReceipt 舞台・イベントの経費精算](https://appshunter.io/ios/app/scanreceipt/id6759530907) - [ScanRenamer - 領収書スキャン＆自動リネーム](https://appshunter.io/ios/app/scanrenamer/id6759813343) - [BLACK NOTE Pad](https://appshunter.io/ios/app/black-note-pad/id6761652314) - [SyncPlay-再生同期-](https://appshunter.io/ios/app/syncplay/id6777845072) - [Wi-FiTALK - Offline Intercom](https://appshunter.io/ios/app/wi-fitalk-offline-intercom/id6783359852) All apps by SUGAR SOUND, K.K.: https://appshunter.io/developer/1811951231 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*