Comparison

Atomic Clock PRO vs StandBy 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

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

StandBy Clock

Transform your iPhone into a personalized bedside display with over 100 customizable widgets. Show time, calendar, battery, photos, and more. Simple to use, just choose, customize, and add to your StandBy screen.

Highlights
  • 100+ customizable widgets
  • Analog and digital clock options
  • Calendar and dual time zone display
  • Countdown timers for events
  • Photo and GIF widgets
  • Customizable theme colors and styles
Features
Read full description

StandBy Clock — Make Your iPhone StandBy Screen Your Own Turn your charging iPhone into a bedside display that feels personal. Explore 240+ widget styles, including 125+ Premium designs, with flip clocks, GIF animations, photos, countdowns, calendars, battery displays and multi-time-zone layouts. Start with free designs, then unlock everything with weekly, annual or lifetime options. CLOCK WIDGETS • Analog Clock — Classic and modern faces with distinctive hands, markers and layouts. • Digital Clock — Bold, easy-to-read time displays made for desks and nightstands. • Calendar — See the date and day at a glance in a range of visual styles. • Single Time Zone — Focus on one city with rich, expressive layouts. • Dual Time Zone — Keep two cities visible for travel, remote work or someone far away. • Triple Time Zone — Follow three cities at once with flip boards, dashboards, neon styles and more. MORE THAN A CLOCK • Countdown — Count down to birthdays, anniversaries, trips and important moments. • Info Card — Put your own message or useful information on the StandBy screen. • Battery — Check the current charge level at a glance. • Photo Widget — Turn a favorite image into part of your bedside display. • GIF Widget — Add motion and personality with animated GIF designs. MAKE IT YOURS Customize colors, fonts, time formats, cities, labels, messages and photos. Save multiple named widgets for different moods and situations, then choose the design you want from the iOS widget picker. BUILT FOR iOS STANDBY StandBy Clock is designed for the landscape charging experience introduced in iOS 17. Place your iPhone on its side while charging to enter StandBy. Always-On Display is supported on compatible Pro iPhone models. HOW TO GET STARTED 1. Choose a free or Premium design. 2. Customize it and save it with a name. 3. Add StandBy Clock from the widget picker. 4. Select your saved design and enjoy your new StandBy screen. FREE AND PREMIUM A selection of designs is free to use. Premium unlocks 125+ additional designs and the complete customization library. Choose the option that suits you: weekly, annual or lifetime access. Available products and local prices are shown in the app before purchase. Download StandBy Clock and make every charging moment look like yours. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Atomic Clock PRO4 screens
StandBy Clock4 screens

Verdict

The call

The clearest difference is rating: Atomic Clock PRO at 4.7 against StandBy Clock's 4.0. Atomic Clock PRO also leads on ratings volume (10K vs 6) and iOS requirement (15.6 vs 17.0). StandBy Clock's advantage is update cadence (every 6 days vs every 3 months) and review sentiment (100% vs 73%). On price, ads, in-app purchases 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 and StandBy Clock sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Atomic Clock PRO holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 73% of Atomic Clock PRO's written reviews are positive against 100% of StandBy Clock's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 3 months, StandBy Clock every 6 days. The most recent releases landed on September 25, 2026 and August 12, 2026 respectively.

Scorecard6 real differences · 4 level
Atomic Clock PRO versus StandBy Clock: the parameters behind the verdict, then further details
ParameterAtomic Clock PROStandBy Clock
PriceFreeFree
Rating4.7 (10K ratings) — better4.0 (6 ratings)
Positive reviews72.7% of reviews100.0% of reviews — better
Number of ratings10K — better6
Update frequencyEvery 3 monthsEvery 6 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB23 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KG逸文 周

Customer experience

Atomic Clock PRO

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

StandBy Clock

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

StandBy 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
3 purchases

StandBy Clock

Subscriptions2
  • Weekly Pro$1.997 Days
  • Annual Pro7 Days trial$6.991 Year
One-time1
  • StandBy Clock Lifetime$14.99

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is StandBy Clock free?
StandBy Clock is free to download, with in-app purchases available.
Which has better reviews, Atomic Clock PRO or StandBy Clock?
Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while StandBy Clock averages 4.0 from 6 ratings.
Do Atomic Clock PRO or StandBy Clock have ads?
Both Atomic Clock PRO and StandBy Clock show ads.
Which is updated more often, Atomic Clock PRO or StandBy Clock?
Atomic Clock PRO ships an update every 3 months, and StandBy Clock every 6 days. Most recently, Atomic Clock PRO was updated on September 25, 2026 and StandBy Clock on August 12, 2026.

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