# Opus vs Quartz

The clearest difference is in-app purchases: Quartz at none against Opus's 6. Opus's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Opus sells 6 in-app purchases, starting at $3.99 per month. Quartz asks for nothing beyond the download.

## The numbers

| Metric | Opus | Quartz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Size | 57 MB | 15 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tugrul Erdem Dogru](https://appshunter.io/developer/1857249299) | [Vaibhav Malviya](https://appshunter.io/developer/1896487283) |

## What reviewers say

### Opus

[App page](https://appshunter.io/ios/app/opus-pomodoro-focus-timer/id6757388147)

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Collector Edition (Monthly) | $3.99 | per month |
| Collector Edition (Yearly) | $14.99 | per year |
| American Realism | $2.99 | one-time |
| Surrealism | $2.99 | one-time |
| Abstract Art | $2.99 | one-time |
| Opus Pro: Collector Lifetime | $29.99 | one-time |


### Quartz

[App page](https://appshunter.io/ios/app/quartz-focus-and-flow/id6767556559)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Opus free?

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

### Is Quartz free?

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

### Do Opus or Quartz have ads?

Neither Opus nor Quartz 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.*