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
- This app hasn’t received enough ratings or reviews to display an overview.
Minor improvements and bug fixes.
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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hakaru Hirose
- Size
- 6.4 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.
- iPhone
- 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+
- 4+
- Contains
Advertising
- Copyright
- © 2026 hakaru