TenSync

10-second sync challenge

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

TenSync is a minimal timing game: tap Start, then tap Stop at exactly 10.00 seconds. The twist: when other iPhones running TenSync are on the same Wi-Fi, they auto-discover each other and start every round at the exact same moment (synchronized within ±2 ms). Each device stops independently and sees its own result, so you can race friends in the same room with no setup, no accounts, no servers. A 1-second tick metronome (toggleable) helps you stay in rhythm. An 11-second time limit prevents endless waits. Your best attempt is tracked locally. No accounts. No ads. No tracking.

Ratings & Reviews

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PERFECT and SO CLOSE celebration animations on every round. Best scores are now scoped to today, this week, and this month — pick which one shows in the HUD from settings, or clear them all with one tap.

Version 1.0.2

The developer, Hakaru Hirose, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

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

Size
  • 6.3 MB
Category
  • Casual
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 19 more
  • English, Arabic, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese
Age Rating
4+
Provider
Hakaru Hirose
  • Hakaru Hirose has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
  • Address
    〒1510051
    Tokyo Tokyo 2-39-5 Sendagaya, Shibuya
    Japan
  • Phone Number
    +81 9016664400
  • Email
    hirose@hakaru.net
Copyright
  • © 2026 hakaru
  • Developer Website
  • Privacy Policy

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