# Atomic Clock vs FOCUS TIMER

The clearest difference is update cadence: FOCUS TIMER at every 4 days against Atomic Clock's every 6 weeks. FOCUS TIMER also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Atomic Clock sells 2 in-app purchases, starting at $5.99 per month and FOCUS TIMER sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Atomic Clock ships an update every 6 weeks, FOCUS TIMER every 4 days. The most recent releases landed on October 6, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Atomic Clock | FOCUS TIMER |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 253 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [家宝 戴](https://appshunter.io/developer/1826395838) | [Joe Walker](https://appshunter.io/developer/1887094711) |

## 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, 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 |


### FOCUS TIMER

[App page](https://appshunter.io/ios/app/focus-timer-astro-focus/id6780260229)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English  weekly | $4.99 | per 7 days |
| English Monthly | $9.99 | per month |
| English Annual | $49.99 | per year |


## Frequently asked questions

### Is Atomic Clock free?

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

### Is FOCUS TIMER free?

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

### Do Atomic Clock or FOCUS TIMER have ads?

Neither Atomic Clock nor FOCUS TIMER shows ads.

### Which is updated more often, Atomic Clock or FOCUS TIMER?

Atomic Clock ships an update every 6 weeks, and FOCUS TIMER every 4 days. Most recently, Atomic Clock was updated on October 6, 2026 and FOCUS TIMER on September 20, 2026.

---

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