# Atomic Sync vs ClockSync

The clearest difference is price: Atomic Sync at Free against ClockSync's $0.99. Atomic Sync also leads on iOS requirement (15.0 vs 26.0). ClockSync's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Atomic Sync is free to download; ClockSync costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Atomic Sync ships an update fortnightly, ClockSync every 3 weeks. The most recent releases landed on September 19, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | Atomic Sync | ClockSync |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 27 MB | 4 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Serhii Sereda](https://appshunter.io/developer/1887133214) | [Elegant Chaos Limited](https://appshunter.io/developer/1212020544) |

## What reviewers say

### Atomic Sync

[App page](https://appshunter.io/ios/app/atomic-sync-radio-watch-time/id6761634713)

**Features:** macOS Compatibility

**In-app purchases:** none


### ClockSync

[App page](https://appshunter.io/ios/app/clocksync/id6761755965)

**In-app purchases:** none


## Frequently asked questions

### Is Atomic Sync free?

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

### Is ClockSync free?

ClockSync costs $0.99, with no in-app purchases.

### Do Atomic Sync or ClockSync have ads?

Atomic Sync shows ads; ClockSync does not.

### Which is updated more often, Atomic Sync or ClockSync?

Atomic Sync ships an update fortnightly, and ClockSync every 3 weeks. Most recently, Atomic Sync was updated on September 19, 2026 and ClockSync on August 24, 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.*