# Atomic Clock vs Owlculator

The clearest difference is in-app purchases: Atomic Clock at none against Owlculator's 1. Atomic Clock also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Owlculator sells 1 one-off in-app purchase. Atomic Clock asks for nothing beyond the download.

## The numbers

| Metric | Atomic Clock | Owlculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 29 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [STAN I. C. ALEXANDRU PERSOANA FIZICA AUTORIZATA](https://appshunter.io/developer/1799569348) | [Fishington Studios](https://appshunter.io/developer/344044425) |

## What reviewers say

### Atomic Clock

[App page](https://appshunter.io/ios/app/atomic-clock-exact-time/id6752546454)

**Features:** macOS Compatibility

**In-app purchases:** none


### Owlculator

[App page](https://appshunter.io/ios/app/owlculator-math-notes/id6761601067)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $4.99 | one-time |


## Frequently asked questions

### Is Atomic Clock free?

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

### Is Owlculator free?

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

### Do Atomic Clock or Owlculator have ads?

Neither Atomic Clock nor Owlculator shows ads.

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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.*