Comparison

Atomic Clock PRO vs Simple_Clock

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

This app provides highly accurate time by syncing with official atomic clock servers. Customize your display with digital or analog views, personal backgrounds, and adjustable sizes. It's perfect for precise timekeeping, travel, or as a personalized desk clock.

Highlights
  • Atomic clock time synchronization
  • Digital and analog display options
  • Customizable backgrounds
  • Adjustable clock size
  • Automatic time zone recognition
  • Screen always on option
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

Simple_Clock

A minimalist analog clock designed with a classic Apple iPad aesthetic. It offers the unique ability to integrate calendar events and reminders as clock hands for enhanced time management.

Highlights
  • Classic Apple iPad style analog clock
  • Optional calendar integration as clock needles
  • Optional reminders integration as clock needles
  • Minimalist design
Features
Read full description

Classic Apple iPad style clock. Feature • Add Calendar and Reminders as clock needles (optional) Support: vibecoder.company@gmail.com

Screenshots

Atomic Clock PRO4 screens
Simple_Clock2 screens

Verdict

The call

The clearest difference is update cadence: Simple_Clock at weekly against Atomic Clock PRO's every 4 months. Atomic Clock PRO's advantage is ratings volume (10K vs 147) and iOS requirement (15.6 vs 17.0). On price, rating, review sentiment and ads 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 and Simple_Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Atomic Clock PRO against 4.7 for Simple_Clock. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 147, so its average is the more settled of the two. Written reviews are what separate them: 73% of Atomic Clock PRO's written reviews are positive against 71% of Simple_Clock's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 4 months, Simple_Clock weekly. Both last shipped on November 4, 2026.

Scorecard3 real differences · 7 level
Atomic Clock PRO versus Simple_Clock: the parameters behind the verdict, then further details
ParameterAtomic Clock PROSimple_Clock
PriceFreeFree
Rating4.7 (10K ratings) — better4.7 (147 ratings)
Positive reviews72.9% of reviews — better70.6% of reviews
Number of ratings10K — better147
Update frequencyEvery 4 monthsWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB91 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGSeung-Un Ham

Customer experience

Atomic Clock PRO

All ratings10,230 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews425 reviews
Positive72.9%
Neutral5.9%
Negative21.2%

Simple_Clock

All ratings145 ratings
Positive91.7%
Neutral2.1%
Negative6.2%
Written reviews17 reviews
Positive70.6%
Neutral0.0%
Negative29.4%

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

Simple_Clock

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
1 purchases

Simple_Clock

One-time1
  • Remove Ads (Lifetime)$4.99

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is Simple_Clock free?
Simple_Clock is free to download, with in-app purchases available.
Which has better reviews, Atomic Clock PRO or Simple_Clock?
Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Simple_Clock averages 4.7 from 147 ratings.
Do Atomic Clock PRO or Simple_Clock have ads?
Both Atomic Clock PRO and Simple_Clock show ads.
Which is updated more often, Atomic Clock PRO or Simple_Clock?
Atomic Clock PRO ships an update every 4 months, and Simple_Clock weekly. Most recently, Atomic Clock PRO was updated on November 4, 2026 and Simple_Clock on November 4, 2026.

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