# Study Key vs Noori

The clearest difference is in-app purchases: Study Key at none against Noori's 4. Noori's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Noori sells 4 in-app purchases, starting at $2.99 per 7 days. Study Key asks for nothing beyond the download.

Study Key ships an update every 3 weeks, Noori every 2 weeks. The most recent releases landed on September 25, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Study Key | Noori |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 20 MB | 58 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LEAN TRANSITION SOLUTIONS LIMITED](https://appshunter.io/developer/1071218576) | [Lukas Wagner](https://appshunter.io/developer/1553249904) |

## What reviewers say

### Study Key

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Noori

[App page](https://appshunter.io/ios/app/noori/id6761379284)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Noori Premium Weekly | $2.99 | per 7 days |
| Noori Pro Monthly | $6.99 | per month |
| Noori Pro Yearly | $34.99 | per year |
| Noori Ad-free | $3.99 | one-time |


## Frequently asked questions

### Is Study Key free?

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

### Is Noori free?

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

### Do Study Key or Noori have ads?

Neither Study Key nor Noori shows ads.

### Which is updated more often, Study Key or Noori?

Study Key ships an update every 3 weeks, and Noori every 2 weeks. Most recently, Study Key was updated on September 25, 2026 and Noori on September 28, 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.*