AtomicClock vs Precise Timestamp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Precise Timestamp
Capture events with unparalleled accuracy, down to the tenth of a second. Synchronize with NTP servers for precise timekeeping and view detailed sync information. Organize events with descriptions and toggle between absolute and relative time displays.
- NTP server synchronization
- Tenth-of-a-second accuracy
- Absolute and relative time modes
- Event descriptions
- Event sorting and grouping
- Sync time details
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Precise Timestamp: Capture Every Moment Precise Timestamp is your go-to app for capturing the exact time of events down to the tenth of a second. Ensure every moment is pinpointed with utmost accuracy. Features: Unrivaled Timekeeping Accuracy - Achieve high-precision time, synchronized with NTP servers. - Gain complete transparency with details on the last sync time, offset, and round trip time. Dynamic Display Modes: - Effortlessly toggle between Absolute and Relative time displays with a simple click. - Your events, neatly sorted and grouped by dates. - Add rich descriptions to your events, ensuring each stands out. Seamless Event Management: - Benefit from a user-friendly bottom bar for quick toggling between editing and deletion.
Screenshots
Verdict
The clearest difference is in-app purchases: Precise Timestamp at none against AtomicClock's 1. Precise Timestamp also leads on ads (none vs shown) and review sentiment (100% vs 84%). AtomicClock's advantage is ratings volume (5.5K vs 7). On price, update cadence 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
Both are free to download. AtomicClock sells 1 one-off in-app purchase. Precise Timestamp asks for nothing beyond the download.
Precise Timestamp holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: AtomicClock has 5.5K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 84% of AtomicClock's written reviews are positive against 100% of Precise Timestamp's.
AtomicClock ships an update every 3 weeks, Precise Timestamp every 5 weeks. The most recent releases landed on October 12, 2026 and September 17, 2026 respectively.
| Parameter | AtomicClock | Precise Timestamp |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5.5K ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 84.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 5.5K — better | 7 |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Timo Partl | Chris Gillin |
Customer experience
AtomicClock
Precise Timestamp
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
Precise Timestamp
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AtomicClock
- Lifetime Pro Version$6.99
Precise Timestamp
No in-app purchases
Questions
Is AtomicClock free?
Is Precise Timestamp free?
Which has better reviews, AtomicClock or Precise Timestamp?
Do AtomicClock or Precise Timestamp have ads?
Which is updated more often, AtomicClock or Precise Timestamp?
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