Atomic Clock vs 時計 PiP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Clock
This utility provides highly accurate time synchronization using NTP, displaying precise time with millisecond detail. It allows comparison with network time, shows sync offset and latency, and offers various clock styles with customization options. It's designed for users needing a reliable, precise reference clock.
- NTP-based time synchronization
- Millisecond time detail
- Local time and UTC display
- Device offset and network latency indicators
- Automatic sync
- Multiple clock styles
- Customizable colors and night mode
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Atomic Clock – Precision Time is a professional precision clock and NTP time synchronization utility for anyone who needs highly accurate time directly on their device. Use reliable network time synchronization to view precise time with millisecond-level detail. Compare your device clock with network time, check sync offset and latency, switch between local time and UTC, and keep the screen on when you need a stable reference clock. Key features: • NTP-based time synchronization • Millisecond or 1/60-second detail • Local time and UTC display • Device offset and network latency indicators • Automatic sync with configurable intervals • Six clock styles: circular dots, analog, minimalist, binary, neon glow, and flip clock • Custom accent colors and multi-color display • Night mode and keep-screen-on option • Privacy-focused: no account, no analytics, no tracking Atomic Clock – Precision Time is built for precise timing, clock drift checks, latency awareness, and a clean daily precision clock. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
時計 PiP
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時計 PiP シンプルでオシャレな時計アプリ。 ピクチャーインピクチャー(PiP)で、いつでもどこでも現在時刻を秒単位でチラ見できます 特徴 PiP表示に特化 他のアプリを使っていても、画面の隅に時計を常時表示。動画視聴や作業中も時間を見逃しません。 こんなシーンで大活躍 ・配信オペレート中に ・台本チェックしながら ・プレゼン中の時間管理に ・オンライン会議の進行に ・料理や勉強のお供に 自由にカスタマイズ ・デジタル、アナログ、どこかで見た時計を選択可能 ・時計の色 & 背景色を自由に変更 ・8種類のフォントから選択 ・フォントサイズも自由自在 ・1タップで色を反転 ミリ秒表示対応 秒よりさらに細かく、ミリ秒単位での表示もOK。タイムアタックや精密な時間管理にも◎ Dynamic Island & Live Activity対応 ロック画面やDynamic Islandにも時計を表示。iPhoneを置いたままでもサッと時間を確認できます。 ウィジェットに対応 大・中・小のサイズでウィジェットを置くことができます。 もちろんデジタル、アナログ等選べます。 全画面モード 時計だけを大きく表示できる全画面モード。回転ボタンで90度ずつ回せるので、横向き・縦向き自由自在。デスクサイドの時計としても使えます。 開発者を支援 アプリを気に入ってくれた方は、設定画面から開発者へ「コーヒー1杯分」「ケーキ1個分」の寄付ができます --- シンプルだけど、あったら絶対便利。 あなたの毎日に、小さな時計をひとつ。 ---
Screenshots
Verdict
The clearest difference is update cadence: 時計 PiP at every 4 days against Atomic Clock's every 6 weeks. On price, ads, in-app purchases and device support 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. Atomic Clock sells 2 in-app purchases, starting at $5.99 per month and 時計 PiP sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Atomic Clock ships an update every 6 weeks, 時計 PiP every 4 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | Atomic Clock | 時計 PiP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 — better | 18 |
| Further details — not scored | ||
| Size | 9 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | 家宝 戴 | Takehiro Iimure |
In-app purchases
Atomic Clock
- AtomicClock Pro Monthly7 Days trial$5.991 Month
- AtomicClock Pro Monthly7 Days trial$19.991 Year
時計 PiP
- コーヒー1杯$0.49
- ケーキ1つ$1.99









