Best Atomic Clock App

247+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated October 2026

From beginner-friendly picks to power-user tools, our atomic clock app list covers 247+ iPhone apps updated through October 2026. Compare ratings, prices, and screenshots in one place.

Compare top Atomic Clock App (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AtomicClock: NTP TimeAtomicClock: NTP TimeFree4.8★ (5.5K)YesYesSep 2026
2Atomic Clock PROAtomic Clock PROFree4.7★ (10K)YesYesOct 2026
3Atomic Clock: Exact TimeAtomic Clock: Exact TimeFree—NoNoSep 2026
4Atomic Clock (Gorgy Timing)Atomic Clock (Gorgy Timing)$1.994.8★ (5K)NoYesOct 2026
5Atomic Clock – Precision TimeAtomic Clock – Precision TimeFree4.8★ (4)NoYesSep 2026
6Atomic Clock AppAtomic Clock App$2.99—NoNoAug 2026
7The Clocks: Alarm, World ClockThe Clocks: Alarm, World ClockFree4.5★ (21K)YesYesOct 2026
8Radio Wave SyncRadio Wave SyncFree4.5★ (1K)YesYesSep 2026

Top Picks for Atomic Clock App

AtomicClock: NTP Time#1

AtomicClock: NTP Time by Timo Partl

Precision Clock, UTC Reference
Editor's Choice
🔧 Utilities
4.8😊(5.5K 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

This app displays the exact current time synchronized with NTP servers, offering a customizable clock view for precise time checks. It's ideal for setting watches, verifying timestamps, or comparing local and network time.

What We Love

  • 🚀 Accurate time
  • 👍 Highly customizable
  • 🚀 Precise to the second
  • 👍 Easy to use
  • 👍 Helpful for setting watches
  • 👍 Great for hobbyists and professionals
  • 👍 Excellent time standard for watches
  • 👍 Simple and straightforward

Room to Improve

  • 🐛 Server connection issues
  • 🔍 Limited time zone options
  • 💰 Ads diminish clock view
  • 🔍 Lacks some advanced features
  • 🔍 Redundant for some users
Atomic Clock PRO#2

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

Exact Time Digital and Analog
Strong Contender
🔧 Utilities
4.7😐(10K 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

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.

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
  • 🔀 Difficulty in displaying both analog and digital clocks simultaneously

More Atomic Clock App apps to explore

FAQ about Atomic Clock App

What is the best atomic clock app for iPhone?
AtomicClock: NTP Time tops our atomic clock app ranking as of October 2026, with a 4.8-star average from 5.5K App Store ratings, and it's free to download.
Yes — 18 of the top atomic clock app we rank are free to download, including AtomicClock: NTP Time and Atomic Clock PRO.
AtomicClock: NTP Time shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 247+ atomic clock app on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.