Best Accurate Clock App

216+ iOS apps curated and reviewed

4.4 avg rating
18 free apps
Updated June 2026

AtomicClock is the household name in accurate clock app, but it's far from the only option. We track 216+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Accurate Clock App

AtomicClock: NTP Time#1

AtomicClock: NTP Time by Timo Partl

Exact time from precise clocks
Editor's Choice
🔧 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

  • 🚀 Accurate time
  • 👍 Highly customizable
  • 🚀 Precise to the second
  • 👍 Easy to use

Room to Improve

  • 🐛 Server connection issues
  • 🔍 Limited time zone options
  • 💰 Ads diminish clock view
Atomic Clock PRO#2

Atomic Clock PRO by Brachmann Online Marketing GmbH & Co. KG

Exact Time Digital and Analog
Strong Contender
🔧 Utilities
4.7😐(9.8K ratings)
FreeAdsIn-App Purchases
Atomic Clock PRO screenshot 1
Atomic Clock PRO screenshot 2
Atomic Clock PRO screenshot 3
Atomic Clock PRO screenshot 4
Atomic Clock PRO screenshot 5
Atomic Clock PRO screenshot 6

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!

What We Love

  • ⭐ Accurate time display
  • 📟 Useful for timing events
  • 🕰️ Helpful for setting other clocks
  • 🔍 Large, easy-to-read clock face

Room to Improve

  • 💸 Subscription model for ad-free version
  • 📢 Excessive advertisements
  • 🔍 Small font for seconds display
Millisecond Clock#3

Millisecond Clock by Chia-Chun Hsieh

The Most Accurate Clock
Worth Considering
🌟 Lifestyle
4.8(98 ratings)
FreeAdsIn-App Purchases
Millisecond Clock screenshot 1
Millisecond Clock screenshot 2
Millisecond Clock screenshot 3
Millisecond Clock screenshot 4
Millisecond Clock screenshot 5

This clock provides extremely accurate time down to the millisecond on your device, allowing you to measure time differences with precision. You can use it to measure delays in network and video streaming by comparing times displayed on different screens.

More Accurate Clock App apps to explore

4
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)
5
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!

🔧 Utilities
(117)
6
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.

🔧 Utilities
(2.1K)
7
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!

🔧 Utilities
(14K)
8
ExakTime Mobile–Time Clock App
ExakTime Mobile–Time Clock App
ExakTime Mobile–Time Clock App
by Arcoro Holdings Corp.
Free

This mobile time clock app simplifies employee time tracking with GPS stamping, field notes, and photo attachments. It seamlessly syncs with cloud-based time tracking software, streamlining labor management and improving productivity. Try it now for efficient labor expense management and simplified payroll processing.

💼 Business
(266)
9
Time Clock for Employees
Time Clock for Employees
Time Clock for Employees
Punch Clock with GPS
Free

Record employee work hours and locations easily with the Time Clock for Employees app. Features include clocking in/out, tracking breaks, creating timesheets, and GPS shift location recording. Simplify hourly employee management - try it today!

💼 Business
(233)
10
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.

🔧 Utilities
(1.8K)
11
Simple_Clock
Simple_Clock
Simple_Clock
Minimal Analog Clock
Free

This minimal analog clock application, reminiscent of an old Apple iPad style clock, displays a calendar and reminders on its face and offers an ad-free experience with a one-time purchase. Download it now to enjoy a simple and functional clock on your device.

🔧 Utilities
(67)
12
Clock
Clock
Clock
Manage your time with ease
Free

Manage your time effortlessly with this application available on iOS, iPadOS, and macOS. Stay on track with features like World Clock for different time zones, Alarms for timely reminders, Stopwatch for event timing, and Timers for countdowns. Download now for efficient time management.

🔧 Utilities
(16K)
13
ClockZ | Clock Display + Alarm
ClockZ | Clock Display + Alarm
ClockZ | Clock Display + Alarm
Night Stand | Widget | Timer
Free

ClockZ is a versatile clock app with features like timers, alarms, widgets, and stopwatch functionality, perfect for your nightstand. Enjoy free basic features like photo backgrounds, music alarms, and more. Upgrade to ClockZ Premium for additional themes, AR clock features, and more for $2.99/month. Privacy Policy and Terms of Use available.

📊 Productivity
(4.7K)
14
gravity clock
gravity clock
gravity clock
by joerg piringer
$0.99

Experience time in a unique way with an app that visualizes the passage of time through the destruction and reconstruction of a clock face. Features include realistic gravity simulation, digital and analog modes, customizable settings, and more. Explore the beauty of time passing and discover the app here: [link to app video].

🌟 Lifestyle
(18)
15
Time Zone Clock - GoTime
Time Zone Clock - GoTime
Time Zone Clock - GoTime
World, Military Time Converter
Free

Stay on top of different time zones effortlessly with Time Zone Clock! This handy app lets you effortlessly manage multiple time zones, switch between 24hr and 12hr formats, plan global events with ease, and even visualize time differences with a simple slider. Perfect for jet-setters, remote workers, and international social butterflies. Time Zone Clock - Your world clock companion!

🔧 Utilities
(240)
16
Clock - Wake Up Gently
Clock - Wake Up Gently
Clock - Wake Up Gently
Alarm, World Clock & Sleep
Free

This alarm clock app combines essential features like alarm setting, world clock, and fade effects to help you wake up gently and stay on schedule. Download now and experience a simple, beautiful, and customizable alarm clock for your iPhone and iPad.

🔧 Utilities
(212)
17
HeyWeather: Accurate Forecast
HeyWeather: Accurate Forecast
HeyWeather: Accurate Forecast
Weather Maps, Alerts, Widgets
Free

Get accurate and personalized weather forecasts with extended forecasts, radar maps, customizable widgets, and more in one app. Stay informed with real-time notifications and a sleek Apple Watch app design. Download now to take control of your local weather!

☀️ Weather
(528)
18
LCD Clock - Clock & Calendar
LCD Clock - Clock & Calendar
LCD Clock - Clock & Calendar
Clock & Calendar
$1.99

This multifunctional digital clock and calendar app turns your device into a beautiful, minimal display for your desk or bedside table, providing clarity and convenience to your daily life. With features like holiday display, weather forecast, calendar support, and adjustable screen brightness, you can stay organized and informed - try it out today!

🔧 Utilities
(11)
19
Clock In & Out Hours Tracker
Clock In & Out Hours Tracker
Clock In & Out Hours Tracker
Timesheet: Track Work Hour
Free

Effortlessly track and manage your daily activities with precision timers, smart pause/resume, visual insights, personalized notes, custom notifications, and more using this ultimate time management app. Stay organized, reduce stress, and enhance efficiency by downloading now!

💼 Business
(1.3K)
20
The Digital Clock
The Digital Clock
The Digital Clock
Simple Digital Clock
Free

A versatile digital clock app that allows users to display a customizable clock on their screen in portrait or landscape mode without any ads. Customize various features like background color, text color, font, and time display to create your ideal digital clock experience. Start personalizing your clock now!

🌟 Lifestyle
(225)