# PDF Notes S vs NoteOak

The clearest difference is review sentiment: NoteOak at 100% against PDF Notes S's 53%. NoteOak also leads on rating (5.0 vs 4.2) and ads (none vs shown). PDF Notes S's advantage is iOS requirement (13.0 vs 16.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. PDF Notes S sells 2 in-app purchases, starting at $0.99 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 4.2. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews point the same way: 53% of PDF Notes S'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 June 10, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | PDF Notes S | NoteOak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/pdf-notes-s/id961336139/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/noteoak-ai-tutor-and-solver/id6752585884/reviews)** |
| Number of ratings | 5 | **6** |
| Positive reviews | 52.9% 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 S

[App page](https://appshunter.io/ios/app/pdf-notes-s/id961336139)

This app offers a dual-page PDF viewer with smooth scrolling and fast page turns. It also provides document management, quick previews of various file types, and annotation tools. An upgrade removes ads and unlocks full functionality.

**Highlights:** Dual-page PDF viewer, Horizontal/vertical scroll and page turns, Document browser for file organization, Quick Look for various file types, ZIP file preview without unzipping, 8 handwriting tools, Cache manager for fast page turns

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Yearly Plan | $9.99 | per year |


### 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 S free?

PDF Notes S 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 S or NoteOak?

NoteOak is rated higher. PDF Notes S averages 4.2 out of 5 from 5 ratings, while NoteOak averages 5.0 from 6 ratings.

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

PDF Notes S shows ads; NoteOak does not.

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

PDF Notes S ships an update every 6 weeks, and NoteOak every 6 weeks. Most recently, PDF Notes S was updated on June 10, 2026 and NoteOak on July 18, 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.*