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Best Atomic Clock Signal Apps

198+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated May 2026

Every iPhone needs a few good atomic clock signal apps. We benchmark 198+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Atomic Clock Signal

Radio Wave Sync#1

Radio Wave Sync by Kunshan Nianyueri Information Technology Co., Ltd.

Sync Radio Controlled Watch
Editor's Choice
πŸ”§ Utilities
4.5😐(853 ratings)
FreeAdsIn-App Purchases
Radio Wave Sync screenshot 1
Radio Wave Sync screenshot 2
Radio Wave Sync screenshot 3

Sync Radio Wave is an application designed to help calibrate radio-controlled watches that may struggle to receive time signals. By simulating various time wave signals, including those from China, USA, Japan, Germany, and Britain, it offers a solution to accurately sync watches. Utilizing a "Beast Mode" for faster synchronization, users can easily calibrate their watches by following simple steps and ensuring a noise-free environment for optimal performance. For inquiries or support, contact the developer via QQ or email.

What We Love

  • πŸš€ Works as intended
  • πŸ‘ Easy to use
  • πŸ’‘ Innovative solution
  • πŸ”’ Reliable sync

Room to Improve

  • πŸ› Inconsistent performance
  • πŸ’° Paid version required
  • πŸ”‡ Audio issues
AtomicClock: NTP Time#2

AtomicClock: NTP Time by Timo Partl

Exact time from precise clocks
Strong Contender
πŸ”§ Utilities
4.8😊(5.4K ratings)
FreeAdsIn-App Purchases
AtomicClock: NTP Time screenshot 1
AtomicClock: NTP Time screenshot 2
AtomicClock: NTP Time screenshot 3
AtomicClock: NTP Time screenshot 4
AtomicClock: NTP Time screenshot 5

Get precise time with AtomicClock: NTP Time app. It offers accurate time from NTP servers synced with atomic clocks. Enjoy current time displays, analog clock, and customizable time servers. Sync your clocks seamlessly.

What We Love

  • πŸš€ Accurate time
  • πŸ‘ Highly customizable
  • πŸš€ Precise to the second
  • πŸ‘ Easy to use

Room to Improve

  • πŸ› Server connection issues
  • πŸ” Limited time zone options
  • πŸ’° Ads diminish clock view
Atomic Clock (Gorgy Timing)#3

Atomic Clock (Gorgy Timing) by CompuLab, Markus GΓΆmmel

The classic par excellence
Worth Considering
πŸ”§ Utilities
4.8(4.8K ratings)
$1.99In-App Purchases
Atomic Clock (Gorgy Timing) screenshot 1
Atomic Clock (Gorgy Timing) screenshot 2
Atomic Clock (Gorgy Timing) screenshot 3
Atomic Clock (Gorgy Timing) screenshot 4
Atomic Clock (Gorgy Timing) screenshot 5

Check out this ultimate precise time tool using an internet time protocol to fetch time from atomic clocks. It features alarm functions, customizable time server sources, unique colors, and special display options like fractional seconds and night mode. Perfect for users wanting precise timekeeping on their Apple devices.

More Atomic Clock Signal apps to explore

4
Atomic Clock PRO
Atomic Clock PRO
Atomic Clock PRO
Exact Time Digital and Analog
Free

This app offers exact time from an atomic clock, automatically recognizes your time zone, allows personal background images, and lets you switch between digital and analogue clocks by swiping. Available for iPhone and iPad. Download now for free!

πŸ”§ Utilities
(9.8K)
5
Flip clock - no ads
Flip clock - no ads
Flip clock - no ads
Digital Clock&Nightstand clock
Free

A sleek and ad-free digital clock app featuring a flip clock design for easy time tracking. Stay organized and on schedule with this stylish and functional timepiece. Download now for a clutter-free timekeeping experience.

🌟 Lifestyle
(4.1K)
6
ClockPhone big digital clocks
ClockPhone big digital clocks
ClockPhone big digital clocks
Alarm clock, timer, widget
Free

ClockPhone is a versatile clock application perfect for charging stations or repurposing old gadgets. It features large, clear digits with customizable settings, different display modes, and widgets for easy time viewing. Download it for iOS devices and enjoy a visually appealing and functional clock experience.

🌟 Lifestyle
(28K)
7
My Digital Clock
My Digital Clock
My Digital Clock
Stylish Clock with Themes
Free

A sleek and user-friendly digital clock application with customizable features, such as multiple time zone displays, alarms, and a variety of clock styles. Stay organized and on schedule with this handy tool for keeping track of time efficiently.

πŸ”§ Utilities
(7.1K)
8
World Clock Time Zone Widgets
World Clock Time Zone Widgets
World Clock Time Zone Widgets
Timezone Converter Digital UTC
Free

Track time across the world with the World Clock Time Zone Widgets app! Easily add cities, choose between analog and digital clocks, and access various widget styles for your convenience. Get accurate time information, including sunrise times and moon phases, with this user-friendly tool.

✈️ Travel
(21K)
9
DClock - Digital Flip Clock
DClock - Digital Flip Clock
DClock - Digital Flip Clock
Time Widgets & Floating Clock
Free

Get the sleek and stylish digital flip clock widget for your device to stay updated with the time in a retro-inspired way. Enjoy the classic flip clock design on your screen.

πŸ” Reference
(7.6K)
10
Analog Clock Widget - Clock SD
Analog Clock Widget - Clock SD
Analog Clock Widget - Clock SD
analog clock for home widget
Free

Customize your analog clock widget with Clock SD. Personalize the clock face, hands, colors, and display options. Never miss a beat with the ability to prevent auto sleep.

πŸ“Š Productivity
(2.8K)
11
Clock – Simple & Customizable
Clock – Simple & Customizable
Clock – Simple & Customizable
A minimalistic 24h clock app
Free

Clock - Simple and user-friendly alarm clock app that helps you wake up on time every day. Set multiple alarms, choose from different alarm sounds, and customize snooze options. Download now and start your mornings right!

πŸ”§ Utilities
(117)
12
Clock Seconds
Clock Seconds
Clock Seconds
Largest Clock with seconds
Free
πŸ”§ Utilities
(4)
13
The Analog Clock
The Analog Clock
The Analog Clock
Simple Analog Clock
Free

A simple analog clock app that displays a customizable clock on your screen without any ads. Features include changing background color, theme color, and dial letters. Upgrade to the Premium Plan for access to more designs and detailed customization options. Create your perfect analog clock with ease.

πŸ”§ Utilities
(2.1K)
14
Atomic Clock: Exact Time
Atomic Clock: Exact Time
Atomic Clock: Exact Time
Exact time with atomic clocks
Free
πŸ”§ Utilities
(0)
15
The Clocks: Alarm, World Clock
The Clocks: Alarm, World Clock
The Clocks: Alarm, World Clock
Genuine Flip, Digital, Analog
Free

Experience simplicity with The Clocks: Alarm, World Clock app. Choose from flip, digital, or analog clock types, set up to 5 alarms with music capabilities, and track time in 6 locations worldwide. Enjoy touch lock, intuitive gestures, and more. Try it now!

πŸ”§ Utilities
(14K)
16
Clock Wave
Clock Wave
Clock Wave
Sync radio controlled watch.
$1.99

Clock Wave is an app that allows you to calibrate your radio controlled watch or clock by transmitting accurate time signals from major longwave stations worldwide. Simply click the "Transmit" button, follow the instructions, and your watch will be calibrated in minutes.

πŸ”§ Utilities
(227)
17
FaceClock Analogue
FaceClock Analogue
FaceClock Analogue
Awesome Analogue Clocks
Free

Discover an amazing analogue clock app with customizable features such as background images and various clock faces. Stay informed with time announcements in multiple languages and enjoy convenient functions like alarms and music player control. For more information, visit irekasoft.com/faceclock and upgrade to FaceClock Pro for even more features. Contact support@irekasoft.com for assistance.

πŸ”§ Utilities
(353)
18
Fullscreen Clock: Flip & Focus
Fullscreen Clock: Flip & Focus
Fullscreen Clock: Flip & Focus
Aesthetic Study Timer & Widget
Free

Get a personalized time stamp with a classic black-and-white full-screen clock on your photos. Customize text, add bullet screen effects, and choose your own background photo with this cool clock widget.

πŸ”§ Utilities
(1.8K)
19
Nite Time - a simple night clock for your nightstand with flashlight
Nite Time - a simple night clock for your nightstand with flashlight
Nite Time - a simple night clock for your nightstand with flashlight
by Nick Fanger
Free

Experience the simplicity of a night clock app designed for your nightstand with a flashlight feature. Features include big clear numbers, red digits for easy night viewing, brightness control, and the option to display date. Upgrade for additional clock colors and a convenient flashlight function. Make your nights easier with this free app!

πŸ”§ Utilities
(262)
20
Emerald Chronometer
Emerald Chronometer
Emerald Chronometer
by Scapa Flow, LLC
Free
πŸ”§ Utilities
(105)

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