# PDF Notes C vs NoteOak

The clearest difference is review sentiment: NoteOak at 100% against PDF Notes C's 0%. NoteOak also leads on rating (5.0 vs 3.0) and ads (none vs shown). PDF Notes C's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. PDF Notes C sells 1 in-app purchase, starting at $0.49 per month and NoteOak sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

NoteOak holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: NoteOak has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of PDF Notes C's written reviews are positive against 100% of NoteOak's.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PDF Notes C | NoteOak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/pdf-notes-c/id1459073729/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/noteoak-ai-tutor-and-solver/id6752585884/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 22 MB | 42 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AMuseTec Co., Ltd.](https://appshunter.io/developer/342152781) | [WATTS LABS LLC](https://appshunter.io/developer/1828733107) |

## What reviewers say

### PDF Notes C

[App page](https://appshunter.io/ios/app/pdf-notes-c/id1459073729)

This app offers a streamlined PDF viewing experience with a 2-page display, fast page turns, and annotation tools. It also provides quick previews for various file types and a document browser for easy organization.

**Highlights:** 2-page PDF viewer, Fast page turns, Handwriting tools, Document browser, Quick file previews, PDF creation and assembly

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.49 | per month |


### NoteOak

[App page](https://appshunter.io/ios/app/noteoak-ai-tutor-and-solver/id6752585884)

Transform study documents into learning tools with AI. Generate summaries, flashcards, and quizzes from PDFs or photos. Get step-by-step solutions for problems and track your study progress.

**Highlights:** AI-generated summaries, Automatic flashcard creation, Custom quizzes with feedback, Step-by-step problem solver, Study progress tracking, Offline study access

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoteOak Plus | $9.99 | per month |
| NoteOak Plus | $49.99 | per year |


## Frequently asked questions

### Is PDF Notes C free?

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

### Is NoteOak free?

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

### Which has better reviews, PDF Notes C or NoteOak?

NoteOak is rated higher. PDF Notes C averages 3.0 out of 5 from 1 ratings, while NoteOak averages 5.0 from 6 ratings.

### Do PDF Notes C or NoteOak have ads?

PDF Notes C shows ads; NoteOak does not.

### Which is updated more often, PDF Notes C or NoteOak?

PDF Notes C ships an update every 6 weeks, and NoteOak every 6 weeks. Most recently, PDF Notes C was updated on October 6, 2026 and NoteOak on October 5, 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.*