# AtomicClock vs Timegrapher

The clearest difference is rating: AtomicClock at 4.8 against Timegrapher's 2.8. AtomicClock also leads on update cadence (monthly vs every 8 months) and review sentiment (84% vs 55%). Timegrapher's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase and Timegrapher sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AtomicClock holds the better App Store score, 4.8 against 2.8. That said, the two scores are not equally well evidenced: AtomicClock has 5.6K ratings behind it against 46, 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 55% of Timegrapher's.

AtomicClock ships an update monthly, Timegrapher every 8 months. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | AtomicClock | Timegrapher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.6K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews)** | [2.8 (46 ratings)](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771/reviews) |
| Number of ratings | **5.6K** | 46 |
| Positive reviews | **84.3% of reviews** | 55.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 8 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 9 MB |
| Requires iOS | 17.4 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [Attila Lelko](https://appshunter.io/developer/1693385247) |

## What reviewers say

### AtomicClock

[App page](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro Version | $6.99 | one-time |

**What reviewers like**

- 🚀 Accurate time
- 👍 Highly customizable
- 🚀 Precise to the second
- 👍 Easy to use
- 👍 Helpful for setting watches

**What reviewers complain about**

- 🐛 Server connection issues
- 🔍 Limited time zone options
- 💰 Ads diminish clock view
- 🔍 Lacks some advanced features
- 🔍 Redundant for some users

**Reported bugs**

- Crashes on certain iOS versions
- Occasional freezing of hands
- Countdown timer sound not working

**Requested features**

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


### Timegrapher

[App page](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771)

This application uses your device's microphone to measure the accuracy of mechanical watches. It detects ticking sounds to analyze beat rate, beat error, and amplitude, displaying results in real-time and over time.

**Highlights:** Detect BPH, Measure Beat rate, Measure Beat error, Measure Amplitude, Set Lift angle, Real-time sound display, Accuracy over time display

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock full | $5.99 | one-time |

**What reviewers like**

- 👍 Works great for some
- 🎯 Accurate for some users
- 💰 Good value for money (paid features)
- 💡 Useful for watch regulation
- 🎧 Works better with external mic

**What reviewers complain about**

- 😞 Doesn't work for many
- 💸 Requires payment for full functionality
- ❓ Scam accusations
- 📱 Inconsistent readings
- 🚫 No readings at all

**Reported bugs**

- Does not detect ticking
- Does not work at all
- Requires payment to function
- Inaccurate readings
- Unskippable pop-ups

**Requested features**

- Add dark mode
- Keep screen on during use
- Ability to save data per watch
- Improve visual design
- Lower price for Pro version


## Frequently asked questions

### Is AtomicClock free?

AtomicClock is free to download, with in-app purchases available.

### Is Timegrapher free?

Timegrapher is free to download, with in-app purchases available.

### Which has better reviews, AtomicClock or Timegrapher?

AtomicClock is rated higher. AtomicClock averages 4.8 out of 5 from 5.6K ratings, while Timegrapher averages 2.8 from 46 ratings.

### Do AtomicClock or Timegrapher have ads?

AtomicClock shows ads; Timegrapher does not.

### Which is updated more often, AtomicClock or Timegrapher?

AtomicClock ships an update monthly, and Timegrapher every 8 months. Most recently, AtomicClock was updated on October 19, 2026 and Timegrapher on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*