# Cluster2A vs Expert Buffer Designer

The clearest difference is in-app purchases: Expert Buffer Designer at none against Cluster2A's 2. Expert Buffer Designer also leads on device support (3 vs 1) and iOS requirement (13.0 vs 26.2). Cluster2A's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. Cluster2A sells 2 one-off in-app purchases. Expert Buffer Designer asks for nothing beyond the download.

## The numbers

| Metric | Cluster2A | Expert Buffer Designer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/expert-buffer-designer/id6739745588/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | — |
| Monetization | — | Ad-supported |
| Size | 9 MB | 26 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chu-Yi Chang](https://appshunter.io/developer/943416679) | [Bioprocess Tools LLC](https://appshunter.io/developer/1786829896) |

## What reviewers say

### Cluster2A

[App page](https://appshunter.io/ios/app/cluster2a/id1544599436)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| K-means Model | $1.99 | one-time |
| DBSCAN Model | $1.99 | one-time |


### Expert Buffer Designer

[App page](https://appshunter.io/ios/app/expert-buffer-designer/id6739745588)

This application helps scientists and lab professionals design and analyze buffer solutions with a pH calculator and real-time feedback. It offers comprehensive buffer selection, variability analysis, and dynamic pH adjustment for precise results.

**Highlights:** Comprehensive buffer selection with sensitivity visualization, Instant variability analysis with heat map, Detailed compound and ion insights, Dynamic pH adjustment with real-time feedback, Personalized buffer library, Multi-platform availability (iOS, iPad, Mac)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cluster2A free?

Cluster2A is free to download, with in-app purchases available.

### Is Expert Buffer Designer free?

Expert Buffer Designer is free to download, with no in-app purchases.

### Do Cluster2A or Expert Buffer Designer have ads?

Expert Buffer Designer shows ads; Cluster2A 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.*