# AI Notebook vs Image to PDF

The clearest difference is update cadence: Image to PDF at daily against AI Notebook's every 5 weeks. AI Notebook's advantage is iOS requirement (16.0 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI Notebook sells 2 in-app purchases, starting at $9.99 per 7 days and Image to PDF sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AI Notebook ships an update every 5 weeks, Image to PDF daily. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | AI Notebook | Image to PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/image-to-pdf-zpdf/id6761462831/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 23 MB |
| Requires iOS | **16.0** | 18.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 9+ |
| Developer | [Amor Tecnology Limited](https://appshunter.io/developer/1813791097) | [Harsh Kalavadia](https://appshunter.io/developer/1859866027) |

## What reviewers say

### AI Notebook

[App page](https://appshunter.io/ios/app/ai-notebook-note-taking-app/id6747331670)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notebook AI Pro Weekly | $9.99 | per 7 days |
| Notebook AI Pro Yearly | $89.99 | per year |


### Image to PDF

[App page](https://appshunter.io/ios/app/image-to-pdf-zpdf/id6761462831)

Easily convert your photos and images into professional PDF files. Organize, edit, and combine multiple images into a single document with a simple and intuitive interface. Ideal for students and professionals needing on-the-go PDF management.

**Highlights:** Convert photos to PDF, Organize image order, Edit PDF files, Combine multiple images, Simple and intuitive interface, Create professional PDFs

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Image to PDF ZPDF Week | $3.99 | per 7 days |
| Image to PDF ZPDF Year | $24.99 | per year |
| Image to PDF ZPDF Lifetime Gift | $9.99 | one-time |
| Image to PDF ZPDF Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is AI Notebook free?

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

### Is Image to PDF free?

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

### Do AI Notebook or Image to PDF have ads?

Neither AI Notebook nor Image to PDF shows ads.

### Which is updated more often, AI Notebook or Image to PDF?

AI Notebook ships an update every 5 weeks, and Image to PDF daily. Most recently, AI Notebook was updated on October 31, 2026 and Image to PDF on October 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.*