Second vs WithPoP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Second
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
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Precise server time, at a glance. Second-Sync is a time synchronization tool for moments where one second matters, such as course registration and ticketing. It multi-samples the HTTP Date of your chosen site and aligns the difference from the server clock down to milliseconds. Drift tracking maintains accuracy over time, while the PiP timer lets you watch live server time even when using other apps. Key features - Precise synchronization: collects HTTP Date in parallel at least 30 times, then calculates the offset after RTT compensation, outlier removal, and EMA smoothing. - Drift estimation: runs linear regression on measured samples to track the slope of the device clock and maintain accuracy as time passes. - PiP timer: opens a Picture in Picture timer as a companion app, so you can monitor the server clock live while using a browser or other apps. - Example site shortcuts: quick buttons to load course registration pages for major Korean universities and ticket booking sites. - Multilingual support: supports Korean, English, Japanese, and Simplified Chinese, with a separate in-app language setting. Recommended for - Anyone who wants exact server time in situations where it is critical, such as registration, ticketing, or reservations. - Anyone who wants to keep accurate server time visible on iPhone or iPad while booking on the go. Notes - Synchronization may fail on sites that do not support the HTTP Date header. If so, enter another target server or use the example sites in the app. - Picture in Picture works only on supported devices running iOS 15 or later, including iPadOS. - Sync your server time with Second-Sync now. One button gives you stable synchronization and a PiP timer, so you do not miss the important moment!
WithPoP
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WithPoP은 팝업스토어 현장에서 특별한 경험을 선사하는 앱입니다. 팝업스토어 주변에서 QR 코드를 찾아 스캔하면, 아티스트의 목소리와 특별한 이미지를 만날 수 있습니다. 【주요 기능】 - 팝업스토어 주변 위치 감지 - QR 코드 스캔으로 숨겨진 콘텐츠 체험 - 아티스트의 특별한 음성 메시지 감상 - 한국어, 영어, 일본어, 중국어 지원 【사용 방법】 1. 팝업스토어 현장을 방문하세요 2. 전시 공간 곳곳에 숨겨진 QR 코드를 찾으세요 3. 앱으로 QR 코드를 스캔하세요 4. 아티스트만의 특별한 메시지를 즐기세요 팝업스토어에서만 경험할 수 있는 특별한 순간을 WithPoP과 함께하세요.
Screenshots
Verdict
The clearest difference is in-app purchases: WithPoP at none against Second's 1. WithPoP also leads on ads (none vs shown). Second's advantage is update cadence (every 4 days vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Second sells 1 one-off in-app purchase. WithPoP asks for nothing beyond the download.
Second ships an update every 4 days, WithPoP every 6 weeks. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.
| Parameter | Second | WithPoP |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 days — better | Every 6 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 55 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Minjun Kim | Copan Global Co., LTD |
In-app purchases
Second
- 초정확 Pro 업그레이드$1.99
WithPoP
No in-app purchases








