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原子時計：NTP時刻・秒数表示・UTC比較 icon
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原子時計：NTP時刻・秒数表示・UTC比較

Timo Partl · Utilities · Japan store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
Tracking
Daily counts start building from today
Rating
4.7 of 5
117 ratings in this store
Countries it ranks in
0
was 0 on Oct 18, 2026

Revenue

Estimated from the grossing charts of Oct 25, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and it sells nothing in the store (no in-app purchases, free download). Any revenue comes from ads or payments outside the store, which we can't see.
EST. LIFETIME DOWNLOADS
4.1K to 11.7K
Estimated from ratings count
RATINGS
117
AVG RATING
4.68
PRICE
無料
AGE
8.3y
LAST UPDATE
6d ago
VERSION
3.6.25
SIZE
17 MB
AGE RATING
4+

Last 30 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
0 / 30
COUNTRIES NOW
0 (was 0)
EST. REVENUE FROM CHARTS, DAILY · BOTH STORES ONLY EST
Show daily values
Sep 26, 2026not in a grossing chart
Sep 27, 2026not in a grossing chart
Sep 28, 2026not in a grossing chart
Sep 29, 2026not in a grossing chart
Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
Oct 2, 2026not in a grossing chart
Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
Oct 7, 2026not in a grossing chart
Oct 8, 2026not in a grossing chart
Oct 9, 2026not in a grossing chart
Oct 10, 2026not in a grossing chart
Oct 11, 2026not in a grossing chart
Oct 12, 2026not in a grossing chart
Oct 13, 2026not in a grossing chart
Oct 14, 2026not in a grossing chart
Oct 15, 2026not in a grossing chart
Oct 16, 2026not in a grossing chart
Oct 17, 2026not in a grossing chart
Oct 18, 2026not in a grossing chart
Oct 19, 2026not in a grossing chart
Oct 20, 2026not in a grossing chart
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Oct 23, 2026not in a grossing chart
Oct 24, 2026not in a grossing chart
Oct 25, 2026not in a grossing chart
Best rank Sep 26, 2026: not ranked. Now: not ranked. Days at zero are days outside every grossing chart.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.5 reviews / week
  • Trendfalling
  • Recent reviews average4.4 stars
  • Recent 1 and 2 star share12%
From the latest 230 written reviews, covering 3042 days.
RELEASE CADENCE
3 updates in 90 days
  • Typical gap between releases28 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
117 ratings
5★79%
4★15%
3★4%
2★1%
1★2%

What users want

From the latest 230 reviews on the Japan App Store, Jun 27, 2018 to Oct 10, 2026: 12% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Too many ads26%

7 of the 1 and 2 star reviews.

★★★★★ This app has malicious advertisements that try to get you to pay fees to restore your Apple account access.
★★★★★ Advert covers clock unless you pay up.
★★★★★ There is a trial version but it's not usable, because of ads covering the face of the clock.
Price and subscription15%

4 of the 1 and 2 star reviews.

★★★★★ I simply requested a refund and have not received it.
★★★★★ There is a trial version but it's not usable, because of ads covering the face of the clock.
Bugs, things not working11%

3 of the 1 and 2 star reviews.

★★★★★ Had this app for a while and now all of a sudden, it refuses to work
★★★★★ After latest update I believe, today May 14/2019 watch stopped working with sign NO CONNECTION TO SERVER....
Lost data, sync, backup11%

3 of the 1 and 2 star reviews.

★★★★★ This app has malicious advertisements that try to get you to pay fees to restore your Apple account access.
★★★★★ Excessive advertising, deleted app.
Wrong or poor results11%

3 of the 1 and 2 star reviews.

★★★★★ I purchased this app to use on the top of my phone while I'm in the background working and I'm not able to do that. I got a unprofessional message from one of the developer, which is not something of a professional…
★★★★★ Werbung arbeitet mit Fake Schließenbuttons die beim Betätigen die Werbung öffnen.
★★★★★ A previously excellent App now rendered useless with forced Ads Do not recommend
No customer support11%

3 of the 1 and 2 star reviews.

★★★★★ All my other apps working. Junk app. Not reliable. Edit: don't have pop up requests for reviews if you don't want reviews. I see that others had the same problem and also got snarky responses.
★★★★★ No response from server IPhone 10.
★★★★★ “No response from Server”.
Worse after an update7%

2 of the 1 and 2 star reviews.

★★★★★ I opened it recently and and it said, "UPDATE NOW".This is a blatant and dishonest scheme to get people to tap on the advertising banner.
★★★★★ After latest update I believe, today May 14/2019 watch stopped working with sign NO CONNECTION TO SERVER....
WHAT THEY ASK FOR
  • I just have one suggestion: please add a louder click every 5 seconds to it similarly to what it does at the start of every minute. 5★, Sep 1, 2025
  • Can you make this work on the Lock Screen? 3★, Jun 26, 2022
  • Wish there was a button to quickly switch between UTC and local time or it could show both even if it was a second line just showing hours and minutes. 5★, Aug 19, 2021
  • If you could please fix this that would be great. 4★, May 13, 2021
WORDS THAT KEEP COMING UP IN BAD REVIEWS
response from server3
WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Accurate, great results16%

32 of the 4 and 5 star reviews.

★★★★★ I need to synchronize timed observations across several different phones (observers) and this app works well.
★★★★★ I use this app to adjust time when we change the time in November and March. And periodically when I notice a clock is not perfectly set. I like each clock set to the exact time. Nice features. I've noticed a few…
★★★★★ I just have one suggestion: please add a louder click every 5 seconds to it similarly to what it does at the start of every minute. Otherwise, this is a very nice and useful clock.
Easy to use13%

26 of the 4 and 5 star reviews.

★★★★★ This makes setting watches for a synced time very easy!
★★★★★ Easy to use, with many features.
★★★★★ The addition of multiple timezones makes setting a GMT/dual time complication simple, and the app is now perfect.
Useful, it helps9%

17 of the 4 and 5 star reviews.

★★★★★ So useful that a Cesium-beam frequency standard was flown regularly to our sites.
★★★★★ This app has the most useful handset designs and display options for the iPhone.
★★★★★ Being able to sync with different time servers is a great feature. This makes setting watches for a synced time very easy! The unlock for premium gives a lot of options. Simple and clean with many options to customize.
Looks great5%

9 of the 4 and 5 star reviews.

★★★★★ Simple and clean with many options to customize.
★★★★★ Accurate Configurable Beautiful
★★★★★ The display is clean and accurate.
Fun, addictive3%

5 of the 4 and 5 star reviews.

★★★★★ I don't NEED it, but enjoy it.
★★★★★ I use this in conjunction with my stratum 1 server to keep all my devices in sync…it's just fun
★★★★★ It is a very good app that I enjoy.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, Japan App Store.

★★★★★Oct 10, 2026
Excellent app

My go-to clock app

★★★★★Sep 28, 2026
Fraudulent ads

This app has malicious advertisements that try to get you to pay fees to restore your Apple account access. It’s a scam.

★★★★★Sep 19, 2026
Great for exact time measurements

I need to synchronize timed observations across several different phones (observers) and this app works well.

★★★★★Sep 2, 2026
the backbone of my time keeping

it is great to tinker with the ntp servers. lots of fun! this app is the backbone of my time keeping efforts for my cricket league here on Bermuda

★★★★★Aug 11, 2026
A needed reference point.

It works. No issues detected at present…

★★★★★Aug 10, 2026
Best new Atomic Clock I found on the Internet

While the different features and options are fairly basic, this is the simplest to read, gives you the information you really need, like what time is it so it is now my go to for checking time and setting my analog and mechanical clocks and watches.

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

Apple's ad repository couldn't be reached right now. Try again later.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

Meta Ad Library ↗Active Facebook and Instagram adsTikTok Creative Center ↗Top performing TikTok adsTikTok creators ↗Organic videos mentioning the appInstagram ↗Reels and posts under its hashtagYouTube ↗Reviews, tutorials and ShortsDeveloper site ↗Landing page and pricing

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

ntp4ntp utc3atomicclock3utc2pro2

What's new in 3.6.25

• 最新のプラットフォームコンポーネントとの互換性を高め、アプリの信頼性を向上しました • パフォーマンスと安定性を全般的に改善しました

Released Jul 25, 2018. Current version shipped Oct 19, 2026.

Store description

AtomicClockは、NTPタイムサーバーが示す現在時刻を、見やすいアナログ／デジタル時計で確認できる参照用クロックです。腕時計や壁時計を手動で合わせるとき、カメラなどの機器の時刻を調整するとき、ローカル時刻とUTCを比べるとき、秒が重要な場面で役立ちます。 用途に合う時刻表示 • 公開NTPサーバーの選択と独自サーバーの追加 • ローカル時刻とUTCの切り替え • 12時間表示／24時間表示 • 時刻形式のカスタマイズ 秒まで見やすい時計 • なめらかに動く秒針付きアナログ時計 • 見やすいデジタル時計 • 複数の文字盤と時計の針 • ティッキング音 • グリニッジ時報（Greenwich Time Signal） NTPサーバーへの往復時間やストラタムなど、技術情報も確認できます。タップ操作で情報やメニューを隠す、表示を一時停止する、ティッキング音を消すといった操作にも対応しています。 AtomicClockは無料で利用できます。一部の高度な機能にはAtomicClock Proが必要です。Proでは好みの文字盤、針、フォントを選択でき、広告も非表示になります。買い切りで、サブスクリプションはありません。 本アプリは時刻確認と手動調整のための参照用時計であり、端末のシステム時刻を自動変更しません。表示精度は、選択したNTPサーバー、ネットワーク状態、端末の動作環境によって異なります。

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