Time Lock vs SyncFlowBoard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Lock
Send messages that reveal themselves only at a specific time or for a limited duration. Enhance conversations with timed secrets or exclusive meeting details. It's a fun way to build anticipation and curiosity.
- Send timed messages
- Set message visibility duration
- Share secrets
- Exclusive meeting details
- iMessage integration
- Send message reminders
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Thank you for your support. Over a million time locks have been created! -- With time lock, you decide when your message will be visible an for how long. It's a cool new way to spice up your conversations and make your friends curious about the message. Share secrets in a group and only make them visible for a couple of seconds. Or share details on where to meet and make it more exclusive. It's really fun, try it out. The app integrates perfectly with iMessage, it's super easy to use. Because we don't want your messages to be forgotten, we have added a button to quickly send a reminder. Want to remove the app? Follow the instructions here: www.bit.do/del-app
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 price: SyncFlowBoard at Free against Time Lock's $0.99. SyncFlowBoard also leads on in-app purchases (none vs 1) and update cadence (every 3 days vs every 10 months). Time Lock's advantage is iOS requirement (11.0 vs 17.6). On ads 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
SyncFlowBoard is free to download; Time Lock costs $0.99 up front. Time Lock sells 1 one-off in-app purchase. SyncFlowBoard asks for nothing beyond the download.
Time Lock ships an update every 10 months, SyncFlowBoard every 3 days. The most recent releases landed on September 26, 2026 and September 23, 2026 respectively.
| Parameter | Time Lock | SyncFlowBoard |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.8 (12 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 10 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 26 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Fanatic Development | SUGAR SOUND, K.K. |
In-app purchases
Time Lock
- Unlimited MessagesFree
SyncFlowBoard
No in-app purchases









