# SynergyOS vs Atomic Clock

The clearest difference is in-app purchases: SynergyOS at none against Atomic Clock's 2. SynergyOS also leads on update cadence (every 5 days vs every 6 weeks) and rating (5.0 vs 4.8). Atomic Clock's advantage is ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

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

SynergyOS holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

SynergyOS ships an update every 5 days, Atomic Clock every 6 weeks. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SynergyOS | Atomic Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/synergyos/id6743176559/reviews)** | [4.8 (4 ratings)](https://appshunter.io/ios/app/atomic-clock-precision-time/id6760377377/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 9 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Synergy Inc.](https://appshunter.io/developer/1585984272) | [家宝 戴](https://appshunter.io/developer/1826395838) |

## What reviewers say

### SynergyOS

[App page](https://appshunter.io/ios/app/synergyos/id6743176559)

Enhance team productivity and collaboration with a unified platform for communication and file management. This secure app enables instant chats and efficient organization, allowing teams to work together seamlessly from any location.

**Highlights:** Instant team chats, Secure file management, Unified platform, Remote work support, Efficient organization

**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 SynergyOS free?

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

### Is Atomic Clock free?

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

### Which has better reviews, SynergyOS or Atomic Clock?

SynergyOS is rated higher. SynergyOS averages 5.0 out of 5 from 1 ratings, while Atomic Clock averages 4.8 from 4 ratings.

### Do SynergyOS or Atomic Clock have ads?

Neither SynergyOS nor Atomic Clock shows ads.

### Which is updated more often, SynergyOS or Atomic Clock?

SynergyOS ships an update every 5 days, and Atomic Clock every 6 weeks. Most recently, SynergyOS was updated on October 7, 2026 and Atomic Clock on October 6, 2026.

---

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