# Study Key vs StudyCog

Study Key and StudyCog are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Study Key | StudyCog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 20 MB | 1 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [LEAN TRANSITION SOLUTIONS LIMITED](https://appshunter.io/developer/1071218576) | [Adam Pickard](https://appshunter.io/developer/6800092342) |

## What reviewers say

### Study Key

[App page](https://appshunter.io/ios/app/study-key/id1634610509)

**Features:** macOS Compatibility

**In-app purchases:** none


### StudyCog

[App page](https://appshunter.io/ios/app/studycog/id6800092339)

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Study Key free?

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

### Is StudyCog free?

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

### Do Study Key or StudyCog have ads?

Neither Study Key nor StudyCog 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.*