LapLync

One Shared Start

Free · In-App Purchases

No sign-up, no ads. Sync stopwatches across devices over Bluetooth, Wi-Fi, or the internet. Share a 6-digit code and tap Start. LapLync keeps every device on the same clock — precisely. Whether you're timing sprint drills on the sideline, running a swim meet, or coordinating a field exercise across multiple stations, LapLync starts all devices at exactly the same millisecond and keeps them together even when connectivity drops. FOR COACHES AND TRAINERS Hand athletes their phones, share a 6-digit room code (or let them scan your QR), and tap Start. The 3-2-1 countdown fires on every screen simultaneously. Laps and splits are logged automatically — no additional hardware, no manual data entry. FOR COMPETITION TIMEKEEPERS AND OFFICIALS Assign devices to each judge station or timing post, create a room, and every device runs in perfect sync whether they're on the same venue Wi-Fi or each using their own mobile data. Sub-50ms precision, anchored to Apple's NTP time servers. NEVER DROPS — THREE-LAYER RESILIENCE LapLync's connection system degrades gracefully so measurement never stops: • Bluetooth + Wi-Fi (5–30ms): used first when devices share a local network • Internet via WebSocket (30–140ms): auto-switches when devices aren't on the same network • Independent mode: if all connectivity fails, each device keeps running from its NTP anchor — recordings merge automatically when the connection restores A brief "Reconnecting…" banner appears. The stopwatch never pauses. NO ACCOUNT REQUIRED Create a room and share the 6-character code by voice, chat, or QR scan. Participants join in seconds. No sign-up, no password, no email address. When the session ends, the room disappears. UNDO OR DELETE A LAP Recorded the wrong lap? Tap Undo right after it's logged (can be turned off in Settings), or long-press any lap — or swipe in the full lap list — to delete it. The host can delete any lap; participants can delete their own. Deletions sync to every device. HANDS-FREE LAP RECORDING Record laps without touching the screen: the volume buttons, a Bluetooth shutter remote, or a keyboard/page-turner remote. Optional and off by default — turn it on in Settings. LIVE ACTIVITY Watch the running stopwatch right on your Lock Screen and in the Dynamic Island. Optional — turn it off anytime in Settings. WHAT'S INCLUDED Free • Rooms with 2 devices — you and one more • Join any room as a participant, as often as you like • Synchronized start, lap recording, and split times • Full connectivity: local Bluetooth/Wi-Fi, internet relay, and automatic fallback • Your 3 most recent sessions, saved locally LapLync Pro — a one-time in-app purchase • Rooms with up to 8 devices • CSV export — share via AirDrop, Mail, or any app • Unlimited session history, saved locally Only the person who creates the room needs Pro. Joining is always included — hand a phone to anyone and they can take part. No subscription, no ads, no account. PRIVACY FIRST LapLync uses only your device UUID and device name — to identify and label your device within a room. They are kept in temporary session state while the room is active and deleted when the session ends. No location data, no contacts, no tracking, no account. Requires iOS 17 or later.

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- New: Undo a lap right after recording it, or long-press/swipe to delete — hosts can delete any lap, participants their own - New: Record laps without touching the screen using the volume buttons, a Bluetooth shutter remote, or a keyboard remote (optional, off by default) - New: A Live Activity shows the running stopwatch on your Lock Screen and in the Dynamic Island (optional)

Version 1.1.1

The developer, JUKI JUNG, 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 based, for example, on the features you use or your age. Learn More

    Accessibility

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

    Information

    Seller
    JUKI JUNG
    Size
    3.2 MB
    Category
    Sports
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    Languages
    English and 11 more
    • English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 SETLOG
  • Privacy Policy

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