Atomic Clock & Watch Accuracy

3.1.11

Tomas Hubalek

4.81

16,848 reviews

100,000+
Downloads

Free

Adjust your watch with Atomic (NTP) time clock and measure its accuracy

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Atomic Clock & Watch Accuracy combines precise NTP-based time synchronization with wristwatch accuracy tracking, all in one utility. With a solid 4.80 rating from 16,810 ratings and 100,000+ total downloads (2.2K in the last 30 days), it maintains a notable presence in the TOOLS category, though it isn’t ranked in any top list.

Pros & Cons

Dual functionality: time sync via NTP and wristwatch tracking
CSV export for data analysis
Share accuracy charts with friends
Free core features with optional premium upgrade

Lacks a dedicated digital screen/widget or on-device display features that some competitors offer
No built-in digital/analog clock widget or extensive display customization compared to some rivals

About Atomic Clock & Watch Accuracy

Atomic Clock & Watch Accuracy is a tools app developed by Tomas Hubalek.

Download Statistics

Atomic Clock & Watch Accuracy has been downloaded 460 thousand times. In the last 30 days, the app was downloaded 2.2 thousand times.

User Ratings

Atomic Clock & Watch Accuracy is rated 4.81 out of 5 stars. The rating is based on 17 thousand ratings.

App Information

Atomic Clock & Watch Accuracy is FREE to download. The APK download size is 31.33 MB. The latest version available is 3.1.11. The last update was on June 3, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play June 2018.

Description

This app has two main features:

More data about Atomic Clock & Watch Accuracy

Price	Free to download
Total downloads	460 thousand
Recent downloads	2.2 thousand
Rating	4.81 based on 17 thousand ratings
Ranking	Not ranked
Version	3.1.11
APK size	31.3 MB
Number of libraries	35
Suitable for	Everyone
Ads	Contains ads

App Performance Report

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Alternative downloads for the Atomic Clock & Watch Accuracy app

Atomic Clock & Watch Accuracy compared with similar apps

Common keywords of similar apps

Version Adjust Track Wristwatch Watches Functionality Bugs Fixed Protocol Helpful Share List Picture Shown Chart Paid Minor Time Accuracy App Atomic Clock Watch Ntp Servers Free Exact Features Show

Keywords missing from this app

Digital Display Screen Alarm Analog Set Widget Phone World Battery Hour Date Recent Color Lock Colors Accurate Wallpaper Easily Night Flip Clocks Add Sync Huge Seconds Choose Customize Background Smart Reference Server Multiple Options Mode Simple Atomicclock Easy

Google Play Rating history and histogram

Rating history

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15K

1.1K

230

410

Downloads over time

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Atomic Clock & Watch Accuracy has been downloaded 460 thousand times. Over the past 30 days, it averaged 74 downloads per day.

Changelog of Atomic Clock & Watch Accuracy

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Developer information for Tomas Hubalek

Tomas Hubalek

support@hubalek.net

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Comments on Atomic Clock & Watch Accuracy for Android

★★★★★ Francesco Memet · Jan 11, 2026

Excellent. I have a watch which has an accuracy of +/- 1 second every 100000 years. Linked to an atomic clock. It's good to check it, every now and then to see its keeping in sync. And this is just the app to use.

★★★★★ Jonathan Graham · Oct 13, 2025

The best app I've found for tracking watch accuracy over time. Simple to use, and doesn't require you to wait for the top of the minute like other apps.

★★★★★ Mark D · Apr 27, 2026

I regularly use this to set mechanical watches. The countdown sound is very helpful

★★☆☆☆ Ian Gourlay · Dec 11, 2025

I bought a copy of this fairly useful app, yet its current version after a few seconds of being launched, obscures the lower half of the screen with adverts. I suggest that you avoid its use, as the writer is clearly motivated to ransom its access and usability to repeat cash demands to restore app usability. There are other apps for monitoring watch accuracy (including an excellent simple telegrapher) and those have my recommendation over this one, now being uninstalled in disgust.

★☆☆☆☆ Nicholas Seale · Nov 8, 2025

Ad filled the screen and covered a settings button. Can't set custom ntp servers

★☆☆☆☆ ABJ photography & video · Nov 19, 2025

Not even tried this data grabber app. Instead of accept all there should be an option to deny all

Google Play Rankings for Atomic Clock & Watch Accuracy

This app is not ranked

Technologies used by Atomic Clock & Watch Accuracy

15 permissions · 35 libraries

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Trust & Safety: The app requests ad-related identifiers, network state, internet access, foreground service, push notifications, license checks, and Google services. These are typical for a free, ad-supported app and do not indicate access to sensitive data like location. The presence of AdMob, Firebase, and GCM aligns with standard safety practices for apps in this category.

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