Reviews of AtomicClock: Exact NTP Time

By: Timo Partl App

List of user reviews and ratings for AtomicClock: Exact NTP Time

Total ratings

4.72 (Rating count: 18,483)

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Review summary

Users praise AtomicClock for precise, atomic-timed display and its usefulness as a reference tool with customizable widgets and faces. It’s viewed as reliable and worth paying for by many. Repeated negatives focus on intrusive ads, pricing concerns, occasional OS-related glitches, and missing features such as manual sync and AOD support.

Pros

Accurate time displayed and synced to atomic clocks (stays locked to the US Atomic Clock) with sub-second precision.
Very useful as a reference tool with home-screen widgets and the ability to compare device time against multiple time servers; helps set analog watches.
Highly customizable UI with many clock faces, colors, and hand options.
Reliable and well-regarded; many users consider it the best clock app and are happy to pay for the Pro version.
Positive perception of value and quality, with praise for ongoing support and development.

Cons

Intrusive ads, including full-screen pop-ups that cover the clock and disrupt use.
Ads consistently interfere with usability, leading some users to switch to other apps.
Pricing concerns and perceived inflation of Pro features; some users want more options without paying for Pro.
Occasional issues after OS updates (or resets to local time) affecting reliability.
Missing features like manual synchronization and Always-On Display (AOD) support; minor formatting requests (e.g., removing leading zeros) surface as well.

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User Reviews

Recent rating average: 5.00

All time rating average: 4.72

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7% (8)

Date	Author	Comment
2026-08-05	Hu*****	Amazing and fantastic application
Amazing and fantastic application
2026-08-02	Sa*****	👌👍
👌👍
2026-07-27	Ro*****	I love this clock, and it has a military style time period.
I love this clock, and it has a military style time period.
2026-07-11	Mo*****	it's ab accurate clock
it's ab accurate clock
2026-07-07	S *****	Have used for several years. Great for setting clocks, if you are one of those who just wants accurate time
Have used for several years. Great for setting clocks, if you are one of those who just wants accurate time
2026-07-07	Mi*****	Useful app
Useful app
2026-07-04	Ja*****	I've been using this app for years and it's always been consistently accurate and functional, I use it for zeroing my watches and clocks and to see how much certain devices have wondered off zero absolutely would recommend for any Horology enthusiasts
I've been using this app for years and it's always been consistently accurate and functional, I use it for zeroing my watches and clocks and to see how much certain devices have wondered off zero absolutely would recommend for any Horology enthusiasts
2026-07-04	La*****	works great. Never had a problem with it.
works great. Never had a problem with it.
2026-07-02	Jo*****	Superb for setting clocks and watches correct to the second. The sweep second hand and the five beeps when it reaches the top of the clock make it so easy. I have an Omega constellation which is accurate to about 9 seconds per year and really enjoy confirming its accuracy every now and again.
Superb for setting clocks and watches correct to the second. The sweep second hand and the five beeps when it reaches the top of the clock make it so easy. I have an Omega constellation which is accurate to about 9 seconds per year and really enjoy confirming its accuracy every now and again.
2026-07-01	Ji*****	Useful, reliable app, always accurate.
Useful, reliable app, always accurate.