# Study AI vs PDF Tools

The clearest difference is in-app purchases: PDF Tools at none against Study AI's 3. PDF Tools also leads on update cadence (weekly vs every 5 weeks) and iOS requirement (15.5 vs 17.0). Study AI's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Study AI sells 3 in-app purchases, starting at $9.99 per month. PDF Tools asks for nothing beyond the download.

Study AI ships an update every 5 weeks, PDF Tools weekly. Both last shipped on October 8, 2026.

## The numbers

| Metric | Study AI | PDF Tools |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Weekly** |
| Size | 49 MB | 35 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Study AI Studios LLC](https://appshunter.io/developer/1828289858) | [VENTRYDIGITAL TECHNOLOGY LTD](https://appshunter.io/developer/1895929583) |

## What reviewers say

### Study AI

[App page](https://appshunter.io/ios/app/study-ai-exam-prep/id6748967841)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Study AI Monthly Subscription | $9.99 | per month |
| Study AI Yearly Subscription | $35.99 | per year |
| Study AI Yearly Subscription | $35.99 | per year |


### PDF Tools

[App page](https://appshunter.io/ios/app/pdf-tools-scan-merge-split/id6784175522)

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

**In-app purchases:** none


## Frequently asked questions

### Is Study AI free?

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

### Is PDF Tools free?

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

### Do Study AI or PDF Tools have ads?

PDF Tools shows ads; Study AI does not.

### Which is updated more often, Study AI or PDF Tools?

Study AI ships an update every 5 weeks, and PDF Tools weekly. Most recently, Study AI was updated on October 8, 2026 and PDF Tools on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*