# e施工 vs Atomic Clock

The clearest difference is in-app purchases: e施工 at none against Atomic Clock's 2. e施工 also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price, update cadence and ads there is nothing between them.

Both are free to download. Atomic Clock sells 2 in-app purchases, starting at $5.99 per month. e施工 asks for nothing beyond the download.

e施工 ships an update every 2 months, Atomic Clock every 6 weeks. The most recent releases landed on October 4, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | e施工 | Atomic Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/atomic-clock-precision-time/id6760377377/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 9 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chong Qing Shu Qing Co., Ltd.](https://appshunter.io/developer/1040762005) | [家宝 戴](https://appshunter.io/developer/1826395838) |

## What reviewers say

### e施工

[App page](https://appshunter.io/ios/app/e/id1040762006)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atomic Clock

[App page](https://appshunter.io/ios/app/atomic-clock-precision-time/id6760377377)

This utility provides highly accurate time synchronization using NTP, displaying precise time with millisecond detail. It allows comparison with network time, shows sync offset and latency, and offers various clock styles with customization options. It's designed for users needing a reliable, precise reference clock.

**Highlights:** NTP-based time synchronization, Millisecond time detail, Local time and UTC display, Device offset and network latency indicators, Automatic sync, Multiple clock styles, Customizable colors and night mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AtomicClock Pro Monthly | $5.99 | per month |
| AtomicClock Pro Monthly | $19.99 | per year |


## Frequently asked questions

### Is e施工 free?

e施工 is free to download, with no in-app purchases.

### Is Atomic Clock free?

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

### Do e施工 or Atomic Clock have ads?

Neither e施工 nor Atomic Clock shows ads.

### Which is updated more often, e施工 or Atomic Clock?

e施工 ships an update every 2 months, and Atomic Clock every 6 weeks. Most recently, e施工 was updated on October 4, 2026 and Atomic Clock on October 6, 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.*