Comparison

AtomicClock vs Turn On (터논)

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

Turn On (터논)

Read full description

뽀모도로 기법을 기반으로 한 시간 관리 앱입니다. 사용자는 원하는 집중 시간(25분)과 휴식 시간(5분)을 한 세트로 설정되어 있습니다. 타이머가 끝나면 알람과 함께 자동으로 휴식 또는 다음 집중 세션으로 전환됩니다.

Screenshots

AtomicClock4 screens
Turn On (터논)3 screens

Verdict

The call

The clearest difference is in-app purchases: Turn On (터논) at none against AtomicClock's 1. Turn On (터논) also leads on ads (none vs shown). On price, device support and iOS requirement 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. Turn On (터논) asks for nothing beyond the download.

Scorecard2 real differences · 8 level
AtomicClock versus Turn On (터논): the parameters behind the verdict, then further details
ParameterAtomicClockTurn On (터논)
PriceFreeFree
Rating4.8 (5.5K ratings) — better—
Positive reviews84.5% of reviews—
Number of ratings5.5K — better—
Update frequencyEvery 3 weeks—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size17 MB4 MB
Age rating4+4+
DeveloperTimo PartlSANGYEOL CHOI

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

Turn On (터논)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99
None

Turn On (터논)

No in-app purchases

Questions

Is AtomicClock free?
AtomicClock is free to download, with in-app purchases available.
Is Turn On (터논) free?
Turn On (터논) is free to download, with no in-app purchases.
Do AtomicClock or Turn On (터논) have ads?
AtomicClock shows ads; Turn On (터논) does not.

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