# QPS Assay Finder vs Cardinal Study

The clearest difference is update cadence: Cardinal Study at every 3 months against QPS Assay Finder's every 41 months. QPS Assay Finder's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QPS Assay Finder ships an update every 41 months, Cardinal Study every 3 months. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | QPS Assay Finder | Cardinal Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 3 months** |
| Size | 3 MB | 72 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [QPS, LLC](https://appshunter.io/developer/665640156) | [Hello Thread](https://appshunter.io/developer/996237890) |

## What reviewers say

### QPS Assay Finder

[App page](https://appshunter.io/ios/app/qps-assay-finder/id665640153)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cardinal Study

[App page](https://appshunter.io/ios/app/cardinal-study/id6764213269)

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

**In-app purchases:** none


## Frequently asked questions

### Is QPS Assay Finder free?

QPS Assay Finder is free to download, with no in-app purchases.

### Is Cardinal Study free?

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

### Do QPS Assay Finder or Cardinal Study have ads?

Neither QPS Assay Finder nor Cardinal Study shows ads.

### Which is updated more often, QPS Assay Finder or Cardinal Study?

QPS Assay Finder ships an update every 41 months, and Cardinal Study every 3 months. Most recently, QPS Assay Finder was updated on October 10, 2026 and Cardinal Study on October 25, 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.*