Comparison

AtomicClock vs Big Child Treasures

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

Head to head
About

AtomicClock

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.

Highlights
  • Precise time from NTP servers
  • Customizable clock faces
  • Select or add time servers
  • Local and UTC views
  • 12/24 hour modes
  • Customizable time format
  • Acoustic ticking
Features
Read full description

Check precise NTP reference time at a glance. AtomicClock helps you set watches, wall clocks, cameras, and other devices, compare local time with UTC, and follow moments when every second matters. Clear analog and digital time AtomicClock displays current time from NTP servers that reference atomic clocks. Choose a predefined server or add your own, then view local or UTC time in a clean analog or digital clock. Customize your reference clock • Switch between 12-hour and 24-hour time • Customize the time format • Choose from multiple clock faces and hands • Use a smooth, fluid second hand • Add acoustic ticking or the Greenwich Time Signal • Tap the screen to hide information and controls, freeze the display, or mute ticking Details for precise time checks View technical NTP information, including round-trip time and server stratum. Whether you are checking a timestamp, preparing a camera, aligning a wall clock, or setting a watch by hand, the seconds remain clear and easy to follow. AtomicClock is free to use. AtomicClock Pro is available as a one-time purchase with no subscription. It unlocks your preferred clock face, hands, and font, removes ads, and includes upcoming Pro features. AtomicClock displays NTP reference time for comparison and does not change your device’s system time. Results can vary with the selected server, network conditions, and device behavior.

About

Big Child Treasures

Features
Read full description

Big Child Treasures es la aplicación ideal para personas coleccionistas que desean registrar, organizar y mostrar sus colecciones de manera sencilla y visual. Descubre una comunidad vibrante donde puedes compartir tus tesoros, explorar colecciones de otras personas y conectar con quienes comparten tu pasión por el coleccionismo. Mantén un registro detallado de tus piezas, añade fotos y descripciones. ¡Únete y celebra el arte de coleccionar con Big Child Treasures! Términos de uso: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

AtomicClock4 screens
Big Child Treasures4 screens

Verdict

The call

The clearest difference is ads: Big Child Treasures at none against AtomicClock's shown. Big Child Treasures also leads on iOS requirement (14.0 vs 17.4). On price, update cadence, 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. AtomicClock sells 1 one-off in-app purchase and Big Child Treasures sells 2 in-app purchases, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

AtomicClock ships an update monthly, Big Child Treasures every 5 weeks. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
AtomicClock versus Big Child Treasures: the parameters behind the verdict, then further details
ParameterAtomicClockBig Child Treasures
PriceFreeFree
Rating4.8 (5.6K ratings) — better—
Positive reviews84.3% of reviews—
Number of ratings5.6K — better—
Update frequencyMonthly — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.414.0 — better
Further details — not scored
Size17 MB57 MB
Age rating4+4+
DeveloperTimo PartlDiaple Networking SL

Bugs and requests

AtomicClock

Reported bugs

3 issues
  • Crashes on certain iOS versions
  • Occasional freezing of hands
  • Countdown timer sound not working

Requested features

5 requests
  • Add GMT/dual time display
  • Implement widget support
  • Add different second hand sounds
  • Allow setting background color to match watch
  • Include alarm/timer functionality

Big Child Treasures

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99
2 purchases

Big Child Treasures

Subscriptions2
  • BCT Lite Subscription$24.991 Year
  • BCT Premium$79.991 Year

Questions

Is AtomicClock free?
AtomicClock is free to download, with in-app purchases available.
Is Big Child Treasures free?
Big Child Treasures is free to download, with in-app purchases available.
Do AtomicClock or Big Child Treasures have ads?
AtomicClock shows ads; Big Child Treasures does not.
Which is updated more often, AtomicClock or Big Child Treasures?
AtomicClock ships an update monthly, and Big Child Treasures every 5 weeks. Most recently, AtomicClock was updated on November 6, 2026 and Big Child Treasures on October 30, 2026.

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