# Quartzy vs Acid Interval

The clearest difference is rating: Acid Interval at 5.0 against Quartzy's 3.3. Acid Interval also leads on ads (none vs shown). Quartzy's advantage is in-app purchases (none vs 1) and ratings volume (16 vs 1). On price there is nothing between them.

Both are free to download. Acid Interval sells 1 one-off in-app purchase. Quartzy asks for nothing beyond the download.

Acid Interval holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Quartzy has 16 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Quartzy | Acid Interval |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (16 ratings)](https://appshunter.io/ios/app/quartzy/id1613415245/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/acid-interval-focus-timer/id6815378728/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | — |
| Monetization | **Ad-supported** | Freemium |
| Size | 39 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Quartzy, Inc.](https://appshunter.io/developer/1613415697) | [Preston Carr](https://appshunter.io/developer/6815378730) |

## What reviewers say

### Quartzy

[App page](https://appshunter.io/ios/app/quartzy/id1613415245)

Manage your lab's inventory with this mobile tool. Track stock, submit requests, and scan items to ensure supplies are always available, preventing experimental delays. Generate unique barcodes directly from your account.

**Highlights:** Track inventory in real-time, Submit supply requests, Scan and receive items, Print unique barcodes, Up-to-date stock view

**Features:** macOS Compatibility

**In-app purchases:** none


### Acid Interval

[App page](https://appshunter.io/ios/app/acid-interval-focus-timer/id6815378728)

This focus timer offers a visually unique approach to deep work, moving away from traditional interfaces. It provides customizable timers and engaging visual feedback to help users stay on task, even with the screen off. The app prioritizes a distraction-free experience with no account or data syncing required.

**Highlights:** Unique visual interface, Customizable timer intervals, Engaging animation mechanisms, Screen-off notifications, No account or data sync, Phone lock compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acid Interval Pro | $2.99 | one-time |


## Frequently asked questions

### Is Quartzy free?

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

### Is Acid Interval free?

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

### Which has better reviews, Quartzy or Acid Interval?

Acid Interval is rated higher. Quartzy averages 3.3 out of 5 from 16 ratings, while Acid Interval averages 5.0 from 1 ratings.

### Do Quartzy or Acid Interval have ads?

Quartzy shows ads; Acid Interval does not.

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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.*