# Study Key vs Sensory Reader

The clearest difference is in-app purchases: Study Key at none against Sensory Reader's 1. Study Key also leads on iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Sensory Reader sells 1 one-off in-app purchase. Study Key asks for nothing beyond the download.

## The numbers

| Metric | Study Key | Sensory Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 20 MB | 3 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LEAN TRANSITION SOLUTIONS LIMITED](https://appshunter.io/developer/1071218576) | [Sensory App House Ltd](https://appshunter.io/developer/1361994084) |

## What reviewers say

### Study Key

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Sensory Reader

[App page](https://appshunter.io/ios/app/sensory-reader/id6757632977)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Scan and OCR | $0.99 | one-time |


## Frequently asked questions

### Is Study Key free?

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

### Is Sensory Reader free?

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

### Do Study Key or Sensory Reader have ads?

Neither Study Key nor Sensory Reader 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.*