# Atomic Clock vs IFC Opener · IFC File Viewer

The clearest difference is review sentiment: Atomic Clock at 100% against IFC Opener · IFC File Viewer's 0%. IFC Opener · IFC File Viewer's advantage is update cadence (weekly vs every 2 months) and device support (4 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Atomic Clock sells 2 in-app purchases, starting at $5.99 per month and IFC Opener · IFC File Viewer sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Atomic Clock ships an update every 2 months, IFC Opener · IFC File Viewer weekly. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Atomic Clock | IFC Opener · IFC File Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/atomic-clock-precision-time/id6760377377/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 9 MB | 26 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [家宝 戴](https://appshunter.io/developer/1826395838) | [Rush Tools LLC](https://appshunter.io/developer/1896773547) |

## What reviewers say

### Atomic Clock

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

This utility provides highly accurate time synchronization using NTP. View precise time with millisecond detail, compare your device clock to network time, and customize display styles. It's privacy-focused with no tracking or analytics.

**Highlights:** NTP-based time synchronization, Millisecond detail, Local time and UTC display, Offset and latency indicators, Automatic sync, Eight clock styles, Customizable colors, Privacy-focused

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

**In-app purchases (2)**

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


### IFC Opener · IFC File Viewer

[App page](https://appshunter.io/ios/app/ifc-opener-ifc-file-viewer/id6804017667)

Easily open and explore BIM data from IFC files on your Apple devices. Review project details, navigate spatial hierarchies, and audit model health. Export data to JSON or CSV for team collaboration.

**Highlights:** Open and explore IFC files, Spatial structure navigation, Entity browser and search, Bill of quantities review, Model audit and health check, 3D model visualization, Export to JSON and CSV

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Annual Access | $39.99 | per year |


## Frequently asked questions

### Is Atomic Clock free?

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

### Is IFC Opener · IFC File Viewer free?

IFC Opener · IFC File Viewer is free to download, with in-app purchases available.

### Do Atomic Clock or IFC Opener · IFC File Viewer have ads?

Neither Atomic Clock nor IFC Opener · IFC File Viewer shows ads.

### Which is updated more often, Atomic Clock or IFC Opener · IFC File Viewer?

Atomic Clock ships an update every 2 months, and IFC Opener · IFC File Viewer weekly. Most recently, Atomic Clock was updated on November 5, 2026 and IFC Opener · IFC File Viewer on November 1, 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.*