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Second-Sync

Second-Sync

PiP timer for crucial moments

4 ratings
36 reviews
With Ads
🔧 Utilities
📊 Productivity
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • September 23, 2025
  • October 9, 2026

Features

Developer

Minjun Kim
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Second-Sync screenshot #1 for iPhone
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Second-Sync screenshot #4 for iPhone
iphone
ipad
🧾$1.99
In-App Purchase↘︎
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❓8 answered
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About

This utility app provides precise server time synchronization down to milliseconds, crucial for time-sensitive events like registrations and ticketing. It features drift tracking for sustained accuracy and a Picture-in-Picture timer for live monitoring while using other applications.

✓Precise server time synchronization
✓Drift tracking for sustained accuracy
✓Picture-in-Picture (PiP) timer
✓Example site shortcuts
✓Multilingual support
Show original description
+1

What's New in Second

1.5.7

October 9, 2026

• Practice mode improvements • Updated the NOL sync target address

2

Subscriptions & In-App Purchases

$1.99

초정확 Pro 업그레이드

광고 제거와 고정밀 서버시간·테마·연습 모드를 한 번에 해제

User reviews

Most RecentHighest RatedLowest Rated

건의사항

아이폰에서 인강볼 때 현재 시간 표시하는데 쓰고 있어요. 혹시 가로 화면에서 시계를 세로로 세워서 보는 옵션 가능할까요? 감사합니다.
서초구민서초구민

역시 초정확!!!

손가락만 잘못되지 않는다면 할수 있어요!!!
아이고오~77아이고오~77

Response from developer

믿고 사용해주셔서 정말 감사합니다!! 저도 제 앱만 믿고 티켓팅합니다 ㅎㅎ..

내가 써본 것 중에 최고

진짜 이거 하나면 모든게 다 끝
ㅇㅎㄴㅎㅇㅎㄹㅎㅇㅎㄴㅎㅇㅎㄹㅎ

Response from developer

극찬 정말 감사합니다. 🥹 업데이트 할 때 피곤하고 힘들 때 마다 이런 리뷰들 생각해서 힘내곤 합니다. 다시 한 번 정말 감사합니다!!

표준시간 반영이...

안되는거 같습니다. 시차가 있는. 다른나라 선택에도 우리나라 시간 나오거나 동기화 실패안내창만 뜨네요 ㅠㅠ. 결제까지 해봤는데 ㅠㅠ.
속이터진다터져속이터진다터져

Response from developer

현재 원인 파악 중에 있습니다. 불편을 드려 죄송합니다. 해당 기능은 출시 직전에 분명 테스트를 하고 출시했는데 추후 업데이트를 하면서 문제가 된 것 같습니다. 수정이 되는대로 여기 답변으로 알려드리겠습니다. +) 업데이트로 고쳐졌습니다. 불편을 드려 정말 죄송합니다.

아 절 받으세요 진짜

초정확 모바일로 황민현 팬미 2열 중앙 잡았습니다🧡🍑
ෆ⸒⸒⸜( ˶’ᵕ‘˶)⸝ෆ⸒⸒⸜( ˶’ᵕ‘˶)⸝

Response from developer

정말요?! 😳 잘 다녀오세요! 🫡 사용해주시고 리뷰도 남겨주셔서 정말 감사합니다! 🙇🏻

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FAQ

What is Second-Sync?

Second-Sync is a utility application designed to provide precise server time synchronization down to milliseconds. It's particularly useful for time-sensitive events like course registrations and ticket bookings.

How does Second-Sync ensure accuracy?

It achieves precision by multi-sampling the HTTP Date of chosen websites, calculating the offset after RTT compensation, outlier removal, and EMA smoothing. Drift tracking further maintains accuracy over time.

Can I use Second-Sync while using other apps?

Yes, Second-Sync features a Picture-in-Picture (PiP) timer. This allows you to monitor the live server time even when you are using other applications on your device.

What devices support the PiP timer feature in Second-Sync?

The Picture-in-Picture timer feature in Second-Sync works on supported devices running iOS 15 or later, including iPads running iPadOS.

Does Second-Sync have ads?

No, Second-Sync does not contain advertisements. It is a completely ad-free application.

What languages does Second-Sync support?

Second-Sync offers multilingual support, including Korean, English, Japanese, and Simplified Chinese. You can select your preferred language within the app's settings.

What is the update frequency for Second-Sync?

The app was last updated on June 19, 2026, indicating active development. Users can expect regular updates to improve functionality and compatibility.

What is the age rating for Second-Sync?

Second-Sync has an age rating of 4+, making it suitable for a wide range of users, including children and adults.