# AtomicClock vs NTP Inspector

The clearest difference is in-app purchases: NTP Inspector at none against AtomicClock's 1. NTP Inspector also leads on ads (none vs shown) and review sentiment (100% vs 85%). AtomicClock's advantage is ratings volume (5.5K vs 2) and iOS requirement (15.0 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase. NTP Inspector asks for nothing beyond the download.

NTP Inspector 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 2, so its average is the more settled of the two. Written reviews point the same way: 85% of AtomicClock's written reviews are positive against 100% of NTP Inspector's.

AtomicClock ships an update every 3 weeks, NTP Inspector monthly. The most recent releases landed on September 24, 2026 and July 16, 2026 respectively.

## The numbers

| Metric | AtomicClock | NTP Inspector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5.5K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ntp-inspector/id6757625801/reviews)** |
| Number of ratings | **5.5K** | 2 |
| Positive reviews | 84.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [Antonios Chariton](https://appshunter.io/developer/1867948901) |

## 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


### NTP Inspector

[App page](https://appshunter.io/ios/app/ntp-inspector/id6757625801)

This utility app allows you to query NTP servers on the internet and view detailed information from their responses. It helps troubleshoot server issues by providing protocol version, stratum, reference time, and leap second status directly from your device.

**Highlights:** Query NTP servers, View protocol version, Check server stratum, Report reference time, Detect leap seconds, Troubleshoot network issues

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AtomicClock free?

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

### Is NTP Inspector free?

NTP Inspector is free to download, with no in-app purchases.

### Which has better reviews, AtomicClock or NTP Inspector?

NTP Inspector is rated higher. AtomicClock averages 4.8 out of 5 from 5.5K ratings, while NTP Inspector averages 5.0 from 2 ratings.

### Do AtomicClock or NTP Inspector have ads?

AtomicClock shows ads; NTP Inspector does not.

### Which is updated more often, AtomicClock or NTP Inspector?

AtomicClock ships an update every 3 weeks, and NTP Inspector monthly. Most recently, AtomicClock was updated on September 24, 2026 and NTP Inspector on July 16, 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.*