Second-Sync: PiP, Server time.
Never miss a moment with PiP.
Free · Designed for iPad
Now, travel, commuting, or urgent schedules can no longer interfere with your course registration and ticketing.
Accurate server time, at a glance.
"Second-Sync" is a time sync tool designed for moments where every second counts—like course registration or ticketing—by multi-sampling HTTP Date from your desired site and adjusting the error with the server clock down to the millisecond. It maintains accuracy over time through drift tracking, and its PiP timer ensures you never miss real-time server time even while using other apps.
Key Features
- Precision Synchronization: Collects HTTP Date in parallel at least 30 times, then calculates offset after RTT correction, outlier removal, and EMA smoothing.
- Drift Estimation: Performs linear regression on measured samples to track device clock drift, maintaining accuracy over time.
- Picture-in-Picture Timer: Display a PiP timer as a sub-app to monitor server time in real-time while using browsers or other apps.
- Quick Access to Example Sites: Provides shortcut buttons to instantly load major Korean university course registration pages and ticket booking sites.
- Multilingual Support: Supports Korean, English, Japanese, and Simplified Chinese. Language settings can be configured separately within the app.
Recommended For
- Those needing server time in situations where it's critical, such as course registration, ticketing, or reservations.
- Those wanting to view accurate server time on their iPhone or iPad while making reservations outside.
Important Notes
- Synchronization may fail on sites that do not support the HTTP Date header. In such cases, please enter a different synchronization server or use the example sites provided within the app.
- Picture in Picture functionality only works on supported devices (iOS 15 or later, including iPadOS).
- Synchronize your server time with pinpoint accuracy right now. With just one button press, enjoy stable synchronization and a PiP timer—don't miss a crucial moment!
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
Improved usability.
The developer, Minjun Kim, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Minjun Kim
- Size
- 4.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPad
Requires iPadOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
English and 3 more
- English, Japanese, Korean, Simplified Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © Minjun Kim 2025.