Second-Sync

Second-Sync

PiP timer for crucial moments

2 ratings
34 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 23, 2025
  • September 19, 2026

Features

Second-Sync screenshot #1 for iPhone
Second-Sync screenshot #2 for iPhone
Second-Sync screenshot #3 for iPhone
Second-Sync screenshot #4 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

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

1.5.5

September 19, 2026

1. Added scheduled reminders and alarms that notify you at the time you choose. You can set day-of-week repeats, and tap a notification to sync immediately with a saved site. 2. Added per-country time zone settings so the timer can display the time in your preferred region. 3. Added new sync targets, including Asobi Ticket, Japanese accommodation booking and coupon sites, Green Expo 2027, and Taobao. 4. When the server time requires caution, a warning is now shown on the main timer and in the popup, and a related FAQ has been added. 5. The app now shows an update notice when a new version is available.

More
2

In-App Purchases

$1.99

초정확 Pro 업그레이드

광고 제거와 고정밀 서버시간·테마·연습 모드를 한 번에 해제

User reviews

내가 써본 것 중에 최고

진짜 이거 하나면 모든게 다 끝

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.

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🧡🍑

Response from developer

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

.

베리즈도 만들어주시몀 안될가요 ㅠㅠㅠ

Response from developer

네 바로 추가했습니다! 1.5.2에서 쓰실 수 있을 겁니다!! 감사합니다! 🙇🏻 +) 심사가 늦어지고 있습니다. 메일주시면 베리즈 사용법 알려드릴게요.

이거 진짜 미쳤어요

저 이거 인스타랑 스레드 보고 왔는데 정말 혁명입니다..
제가 명절날 ktx 예매 항상 못해서 돈 많이 쓰고 가거나 힘들게 갔는데 이거 덕분에 창가 자리 잡고 갔어요..
여러분 안 쓰시면 후회합니다 3000원? 3000원으로 30만원 아낄 수 있어요 후회 안 합니다 제가 보장함

Response from developer

사용해주셔서 정말 감사합니다! 🙇🏻

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.