Comparison

Atomic Clock PRO vs Toolwatch

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Atomic Clock PRO

Get the most accurate time from an official atomic clock server. This app automatically detects your time zone and allows custom backgrounds. Easily switch between digital and analog clock displays with a swipe.

Highlights
  • Exact time from atomic clock
  • Automatic time zone recognition
  • Customizable background images
  • Digital and analog clock modes
  • Optional sound alerts
  • Color customization
Features
Read full description

Get accurate time on your iPhone and iPad by syncing with an official atomic clock time server. Download now for free! If you want exact time, a precise time reference, or an easy-to-read clock display, this app is designed for that. It automatically recognizes your time zone, lets you use one of your own photos as the background, and lets you switch between a digital display and a classic analog clock with a simple swipe. It is ideal as a personalized desk clock, a reliable travel companion, an everyday reference clock, or when you need exact time to set a mechanical watch accurately. Overview: - Accurate and precise time synced from an official atomic clock time server - Automatically recognizes your time zone and shows the current local time - Choose digital, analog, or combined analog and digital clock displays - Swipe to switch between clock displays - Resize the digital clock for a larger or smaller display - Includes time (hours, minutes, and seconds), date, and day of the week (optional) - Optional sound every second or every minute - Change clock and background colors - Use your own photos as background images - Choose atomic clock sync or your device's system clock - Option to keep the screen awake while the app is open - Works in portrait and landscape mode - For iPhone and iPad Helpful for: - A personalized desk clock at home or at work - Getting the correct local time while traveling - Setting a mechanical watch accurately - A clear reference clock when you want accurate, easy-to-read time PLEASE NOTE: You can switch between the analog and digital clock by swiping left or right across the clock. Disclaimer: Please note that whilst all reasonable care has been taken to make this application as accurate as possible we can not guarantee 100% accuracy. Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Toolwatch

Measure and track the accuracy of your mechanical watches. Get personalized tips for watch care and determine if your timepiece needs servicing. Discover how your watch performs compared to others.

Highlights
  • Measure watch accuracy
  • Track watch performance
  • Personalized watch care tips
  • Identify need for servicing
  • Compare watch accuracy
Features
Read full description

Measure and track the accuracy of your mechanical watches. Toolwatch is a free watch accuracy app trusted by the watchmaking industry's leaders and 15 000+ monthly users. Is your watch accurate? Should it be serviced? How does it compare versus other watches? Find out now by measuring the accuracy of your watch! Toolwatch also brings to you the best tips, tailored on your watch for taking care of your watches. "Toolwatch is the best watch accuracy app out there and it's free!" - Guillaume Cassez, Manufacture Jaeger-LeCoultre "I regularly check the accuracy of my watch collection and Toolwatch is my favorite app for that." - Thomas Hulin, Van Cleef & Arpels "I had the feeling my watch was running late, now I am sure thanks to Toolwatch and I could get my watch serviced for free as it was still under warranty!" - Benjamin Baudisson, Vacheron Constantin "As a watch collector, knowing when to service my watch is crucial. Toolwatch helps me taking care of my mechanical watches." - Alex Ghotbi, Watch Specialist- Associate Director at Phillips Watches As seen on ABlogToWatch, FratelloWatches, Theo & Harris, WristReview, Europa Star and more. Find out now if your watch is accurate, it is FREE using Toolwatch mobile app.

Screenshots

Atomic Clock PRO4 screens
Toolwatch4 screens

Verdict

The call

The clearest difference is rating: Atomic Clock PRO at 4.7 against Toolwatch's 3.3. Atomic Clock PRO also leads on review sentiment (73% vs 34%) and ratings volume (10K vs 459). Toolwatch's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month. Toolwatch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Atomic Clock PRO holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 459, so its average is the more settled of the two. Written reviews point the same way: 73% of Atomic Clock PRO's written reviews are positive against 34% of Toolwatch's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 3 months, Toolwatch monthly. The most recent releases landed on September 26, 2026 and September 17, 2026 respectively.

Scorecard8 real differences · 2 level
Atomic Clock PRO versus Toolwatch: the parameters behind the verdict, then further details
ParameterAtomic Clock PROToolwatch
PriceFreeFree
Rating4.7 (10K ratings) — better3.3 (459 ratings)
Positive reviews72.7% of reviews — better33.8% of reviews
Number of ratings10K — better459
Update frequencyEvery 3 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.69.0 — better
Further details — not scored
Size6 MB14 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGMathieu Nayrolles

Customer experience

Atomic Clock PRO

All ratings10,111 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews421 reviews
Positive72.7%
Neutral6.2%
Negative21.1%

Toolwatch

All ratings458 ratings
Positive57.4%
Neutral5.0%
Negative37.6%
Written reviews198 reviews
Positive33.8%
Neutral8.6%
Negative57.6%

Bugs and requests

Atomic Clock PRO

Reported bugs

3 issues
  • Second hand occasionally runs in reverse
  • Digital clock display cuts off on some devices
  • Inconsistent behavior when switching between clock types

Requested features

3 requests
  • Customizable clock face options
  • Ability to set widget on home screen
  • Sync with system clock to automatically update time

Toolwatch

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Atomic Clock PRO

Subscriptions1
  • Premium$1.991 Month
One-time1
  • Remove Ads$5.99
None

Toolwatch

No in-app purchases

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is Toolwatch free?
Toolwatch is free to download, with no in-app purchases.
Which has better reviews, Atomic Clock PRO or Toolwatch?
Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Toolwatch averages 3.3 from 459 ratings.
Do Atomic Clock PRO or Toolwatch have ads?
Atomic Clock PRO shows ads; Toolwatch does not.
Which is updated more often, Atomic Clock PRO or Toolwatch?
Atomic Clock PRO ships an update every 3 months, and Toolwatch monthly. Most recently, Atomic Clock PRO was updated on September 26, 2026 and Toolwatch on September 17, 2026.

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