# LM NoteBook PRO vs ChatPDF

The clearest difference is review sentiment: LM NoteBook PRO at 100% against ChatPDF's 0%. LM NoteBook PRO also leads on ads (none vs shown) and ratings volume (15 vs 5). ChatPDF's advantage is rating (4.2 vs 3.1). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. LM NoteBook PRO sells 5 in-app purchases, starting at $0.99 per 7 days and ChatPDF sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ChatPDF holds the better App Store score, 4.2 against 3.1. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews complicate that: 100% of LM NoteBook PRO's written reviews are positive against 0% of ChatPDF's, so the app with the better star average is not the one people write more warmly about.

LM NoteBook PRO ships an update every 5 weeks, ChatPDF every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | LM NoteBook PRO | ChatPDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (15 ratings)](https://appshunter.io/ios/app/lm-notebook-pro-learn-fast/id6478384912/reviews) | **[4.2 (5 ratings)](https://appshunter.io/ios/app/chatpdf-summarize-and-ask-pdf/id6502504985/reviews)** |
| Number of ratings | **15** | 5 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 123 MB | 24 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ENGLISH IN GAMES](https://appshunter.io/developer/1656052466) | [Tiny Leo Co., Ltd](https://appshunter.io/developer/1660777736) |

## What reviewers say

### LM NoteBook PRO

[App page](https://appshunter.io/ios/app/lm-notebook-pro-learn-fast/id6478384912)

Transform any document, article, or web page into an active learning experience. Generate AI summaries, create flashcards, take quizzes with explanations, and test your knowledge through voice prompts. Build a personal knowledge hub for effective learning and faster recall.

**Highlights:** AI summaries, Quizzes with explanations, Knowledge cards & active recall, Voice knowledge checks, Document chat, Diagram generation, Tap-to-translate & text-to-speech

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summify: AI Summarizer Weekly | $0.99 | per 7 days |
| Summify: AI Summarizer Monthly | $2.99 | per month |
| Monthly Limitless Bundle | $7.99 | per month |
| Summify: AI Summarizer Annual | $19.99 | per year |
| Annual Limitless Bundle | $49.99 | per year |


### ChatPDF

[App page](https://appshunter.io/ios/app/chatpdf-summarize-and-ask-pdf/id6502504985)

This AI-powered chatbot helps you interact with PDF documents by providing instant summaries, answering detailed questions, and highlighting key information. It streamlines document analysis for students, professionals, and researchers, saving time and enhancing understanding.

**Highlights:** Upload and chat with PDFs, Instant document summaries, Detailed Q&A on content, Keyword search and highlighting, Multi-language support, User-friendly interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial Premium | $2.99 | per 7 days |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is LM NoteBook PRO free?

LM NoteBook PRO is free to download, with in-app purchases available.

### Is ChatPDF free?

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

### Which has better reviews, LM NoteBook PRO or ChatPDF?

ChatPDF is rated higher. LM NoteBook PRO averages 3.1 out of 5 from 15 ratings, while ChatPDF averages 4.2 from 5 ratings.

### Do LM NoteBook PRO or ChatPDF have ads?

ChatPDF shows ads; LM NoteBook PRO does not.

### Which is updated more often, LM NoteBook PRO or ChatPDF?

LM NoteBook PRO ships an update every 5 weeks, and ChatPDF every 2 months. Most recently, LM NoteBook PRO was updated on October 25, 2026 and ChatPDF on October 24, 2026.

---

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