Comparison

Atomic Clock vs FlowChrono

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Atomic Clock

Features
Read full description

Always know the exact time with Atomic Clock – Precise Time. Our app synchronizes with official atomic time servers to deliver ultra-accurate time down to the millisecond. Whether you’re coordinating across time zones, managing scientific experiments, or simply want the most reliable clock, this app provides unmatched precision. Features: - Real-time synchronization with global atomic clock servers - 24-hour and 12-hour display options - Beautiful, minimal clock face with dark mode - Works online and offline with last known atomic time - Perfect for professionals, travelers, pilots, scientists, and anyone who values absolute accuracy. An atomic clock is a timekeeping device that measures time based on the vibrations or transitions of atomsβ€”usually cesium or rubidium. Unlike mechanical or quartz clocks, which rely on moving parts or crystals, atomic clocks use the natural oscillations of atoms as their frequency standard. This makes them the most accurate clocks ever developed, capable of maintaining time to within a few billionths of a second per day. Atomic clocks are essential for applications where extreme precision is required, such as GPS navigation, telecommunications, space exploration, scientific experiments, and synchronizing global networks.

About

FlowChrono

Features
Read full description

FlowChrono is a professional-grade multifunctional timer app, specifically designed for users who require precise time management and collaboration across time zones. It seamlessly integrates three core functions: stopwatch, countdown timer, and world clock, featuring a modern black theme design that provides a smooth, intuitive, and efficient time management experience. High-precision stopwatch:Supports millisecond-level timing, including count function Smart Countdown:Multiple preset time options, with support for custom duration World Clock:Times of major cities around the world, updated in real-time Personalized theme:Multiple color themes to choose from Smart Reminder:Countdown end reminder function

Screenshots

Atomic Clock3 screens
FlowChrono4 screens

Verdict

The call

The clearest difference is ads: Atomic Clock at none against FlowChrono's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Β· 5 level
Atomic Clock versus FlowChrono: the parameters behind the verdict, then further details
ParameterAtomic ClockFlowChrono
PriceFreeFree
Update frequencyβ€”Every 6 days
AdsNo β€” betterYes
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.1 β€” better15.6
Further details β€” not scored
Size29 MB46 MB
Age rating4+4+
DeveloperSTAN I. C. ALEXANDRU PERSOANA FIZICA AUTORIZATAζ³½ι‘« ηŽ‹

In-app purchases

None

Atomic Clock

No in-app purchases

None

FlowChrono

No in-app purchases

Questions

Is Atomic Clock free?
Atomic Clock is free to download, with no in-app purchases.
Is FlowChrono free?
FlowChrono is free to download, with no in-app purchases.
Do Atomic Clock or FlowChrono have ads?
FlowChrono shows ads; Atomic Clock does not.

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