# PDF Pro vs Smart Studbook Connections

The clearest difference is in-app purchases: Smart Studbook Connections at none against PDF Pro's 12. Smart Studbook Connections also leads on update cadence (every 4 weeks vs every 2 months) and iOS requirement (12.0 vs 17.0). PDF Pro's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. PDF Pro sells 12 in-app purchases, starting at $1.99 per month. Smart Studbook Connections asks for nothing beyond the download.

PDF Pro ships an update every 2 months, Smart Studbook Connections every 4 weeks. The most recent releases landed on September 27, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | PDF Pro | Smart Studbook Connections |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6.9K ratings)](https://appshunter.io/ios/app/pdf-pro-reader-editor-forms/id454936656/reviews)** | — |
| Number of ratings | **6.9K** | — |
| Positive reviews | 60.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Subscription | — |
| Size | 91 MB | 43 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | **iPhone, iPad, Mac** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dominic Rodemer](https://appshunter.io/developer/309872333) | [Streamlined BV](https://appshunter.io/developer/703369008) |

## What reviewers say

### PDF Pro

[App page](https://appshunter.io/ios/app/pdf-pro-reader-editor-forms/id454936656)

Edit, annotate, and read PDF documents on your iPhone and iPad. Highlight text, add notes, shapes, voice recordings, and photos. Search your entire PDF library, fill out forms, and sign documents.

**Highlights:** Edit and annotate PDFs, Highlight text and add notes, Embed audio and photo annotations, Full-text search of PDF library, Fill out and sign PDF forms, Organize PDFs with folders and tags, Import from cloud storage

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Offer - Monthly - macOS | $1.99 | per month |
| Offer - Monthly - iOS | $2.99 | per month |
| Premium - Monthly - iOS | $3.99 | per month |
| Premium - Monthly - macOS | $4.99 | per month |
| Offer - Annual - iOS | $12.99 | per year |
| Offer - Annual - macOS | $22.99 | per year |
| Premium  - Annual - iOS | $24.99 | per year |
| Offer - macOS + iOS | $24.99 | per year |
| Offer - iOS + macOS | $29.99 | per year |
| Premium - Annual - macOS | $44.99 | per year |
| Premium - iOS + macOS | $49.99 | per year |
| Premium - macOS + iOS | $49.99 | per year |

**What reviewers like**

- 👍 User-friendly interface
- 🚀 Fast and efficient
- 💡 Excellent PDF management features
- 🔒 Secure and reliable
- 🎨 Great annotation tools

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 💰 Expensive subscription model
- 🔍 Inconsistent search functionality
- 📖 Loses last read position
- 🖋️ Unreliable handwriting support

**Reported bugs**

- Annotations and highlights randomly disappearing
- Compatibility issues with newer iOS versions
- Corrupted PDF files after editing
- Slow performance on older devices
- Inconsistent behavior when switching between PDFs

**Requested features**

- Improved bookmarking and note-taking
- Seamless iCloud/cloud storage integration
- Customizable keyboard shortcuts
- Advanced text editing and OCR capabilities
- Better organization and folder management


### Smart Studbook Connections

[App page](https://appshunter.io/ios/app/smart-studbook-connections/id1521411904)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Pro free?

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

### Is Smart Studbook Connections free?

Smart Studbook Connections is free to download, with no in-app purchases.

### Do PDF Pro or Smart Studbook Connections have ads?

Neither PDF Pro nor Smart Studbook Connections shows ads.

### Which is updated more often, PDF Pro or Smart Studbook Connections?

PDF Pro ships an update every 2 months, and Smart Studbook Connections every 4 weeks. Most recently, PDF Pro was updated on September 27, 2026 and Smart Studbook Connections on September 10, 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.*