LIVEACROSS vs SyncFlowBoard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LIVEACROSS
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◆LIVEACROSSの利用には、対応機器「GV-LSMIXER/I」が必要です◆ LIVEACROSSは、株式会社アイ・オー・データ機器製「GV-LSMIXER/I」専用のアプリケーションです。 添付の専用ケーブルでGV-LSMIXER/IとiPadを接続することで、GV-LSMIXER/Iの設定、制御を行うことができます。 ■主な機能 ・ライブ配信制御機能 ・ビデオスイッチング機能 ・オーディオミキシング機能 ・テキストオーバーレイ(テロップ挿入)機能(カスタムフォント対応) ・画像オーバーレイ機能 ・ピクチャーインピクチャー(PiP)機能 ・シーン切替機能 ・USBストレージへの録画機能 ・シーン編集機能 ・RTSP、ONVIF配信機能 ■対応OS 動作確認済みの対応OSについては、以下の製品仕様ページにてご確認ください。 https://www.iodata.jp/product/av/streaming-box/gv-lsmixeri/ ■対応デバイス 動作確認済みの対応デバイスについては、以下の製品仕様ページにてご確認ください。 https://www.iodata.jp/product/av/streaming-box/gv-lsmixeri/
SyncFlowBoard
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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.
Screenshots
Verdict
The clearest difference is update cadence: SyncFlowBoard at every 3 days against LIVEACROSS's every 4 months. LIVEACROSS's advantage is iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
LIVEACROSS ships an update every 4 months, SyncFlowBoard every 3 days. The most recent releases landed on September 11, 2026 and August 8, 2026 respectively.
| Parameter | LIVEACROSS | SyncFlowBoard |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 230 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | I-O DATA, INC. | SUGAR SOUND, K.K. |
In-app purchases
LIVEACROSS
No in-app purchases
SyncFlowBoard
No in-app purchases





