Second vs 퉁
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!
퉁
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"누가 누구한테 얼마 보내면 돼?" 렌터카는 지혜가 냈고, 점심은 재석이가 냈는데 둘만 먹었고, 카페는 재인이가 긁었고… 얽히고설킨 빚을 전부 "퉁!!!!" 쳐드립니다. ■ 3번의 탭이면 입력 끝 - 모임을 만들고 이름만 적으세요. 회원가입도, 초대도 없습니다. - 지출마다 금액·낸 사람·나눌 사람만 고르면 끝. - 다 같이 쓴 것, 몇 명만 쓴 것, 돌아가며 산 것 — 전부 자동 계산. ■ 송금은 최소 횟수로 복잡하게 얽힌 빚을 수학적으로 정리해, 보낼 횟수를 줄여드립니다. 여러 명이 얽혀도 송금은 몇 번이면 끝. ■ 결과는 이미지 한 장으로 정산 결과를 카드로 만들어 보낼 수 있습니다. 각자 자기가 보낼 금액만 확인하면 됩니다. ■ 해외여행도 그대로 엔·달러·유로로 쓴 돈은 우리끼리 정한 환율(예: 100¥ = 950원)로 입력하면 원화로 정산됩니다. ■ 퉁이 다른 이유 - 회원가입 없음 · 로그인 없음 · 서버 없음 · 광고 없음 - 모든 기록은 오직 내 폰에만 저장 (비행기 모드에서도 완벽 동작) - 아무 데이터도 수집하지 않습니다 퉁 치면, 끝.
Screenshots
Verdict
The clearest difference is in-app purchases: 퉁 at none against Second's 1. 퉁 also leads on ads (none vs shown). On price, update cadence, 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. 퉁 asks for nothing beyond the download.
Second ships an update every 4 days, 퉁 every 3 days. The most recent releases landed on October 11, 2026 and October 1, 2026 respectively.
| Parameter | Second | 퉁 |
|---|---|---|
| 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 | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 55 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Minjun Kim | Jihye Shin |
In-app purchases
Second
- 초정확 Pro 업그레이드$1.99
퉁
No in-app purchases









