Comparison

LIVEACROSS vs SyncFlowBoard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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/

About

SyncFlowBoard

Features
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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

SyncFlowBoard3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 4 level
LIVEACROSS versus SyncFlowBoard: the parameters behind the verdict, then further details
ParameterLIVEACROSSSyncFlowBoard
PriceFreeFree
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPadiPhone, iPad — better
Requires iOS13.0 — better17.6
Further details — not scored
Size230 MB5 MB
Age rating4+4+
DeveloperI-O DATA, INC.SUGAR SOUND, K.K.

In-app purchases

None

LIVEACROSS

No in-app purchases

None

SyncFlowBoard

No in-app purchases

Questions

Is LIVEACROSS free?
LIVEACROSS is free to download, with no in-app purchases.
Is SyncFlowBoard free?
SyncFlowBoard is free to download, with no in-app purchases.
Do LIVEACROSS or SyncFlowBoard have ads?
Neither LIVEACROSS nor SyncFlowBoard shows ads.
Which is updated more often, LIVEACROSS or SyncFlowBoard?
LIVEACROSS ships an update every 4 months, and SyncFlowBoard every 3 days. Most recently, LIVEACROSS was updated on September 11, 2026 and SyncFlowBoard on August 8, 2026.

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