Comparison

PDF Notes S vs NoteOak

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PDF Notes S

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
Read full description

PDF Notes S gives you a 2 pages viewer with horizontal/vertical scroll, and cache for fast page turns, and thumbnails scrollbar. PDF Notes S gives you ZIP Preview, Quick Look of documents, images, music, videos, and etc. PDF Notes S gives you Document Browser so that you can organize all your files very easily. PDF Viewer - 1 page or 2 pages, horizontal or vertical fast page turns - Scroll or page turns by tap on sides - 8 handwriting tools that you can adjust color and line width - Horizontal or vertical thumbnails scrollbar - PDF outlines, bookmarks, and annotations list - PDF search - Cache manager supports 3 modes, permanent cache, automatic cache, and no cache Quick Look, ZIP Preview - PDF, RTF, TEXT - iWork documents, Office documents - Images, Music, PiP Videos - Without Unzip, preview ZIP contents (password may be requested if locked) Advertisements before upgrade - Banner ads can be shown at the bottom - Interstitial ads can be shown per 30 minutes Information about the auto-renewable nature of the subscription - Payment will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. A link to privacy policy and terms of use - http://blog.musebook.com/2017/03/privacy-policy.html The length of the subscription - Monthly or Yearly NOTE: All content contained herein is subject to change without notice.

About

NoteOak

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
Read full description

NoteOak transforms your study documents into powerful learning tools using advanced AI technology. Upload any PDF or photo and instantly generate summaries, flashcards, and quizzes tailored to your content. Get concise AI summaries of lengthy documents in seconds. Create flashcards automatically from your materials with spaced repetition. Test your knowledge with AI-created quizzes and instant feedback. Snap a photo of any problem and get step-by-step solutions with our problem solver. Monitor your study streaks, accuracy, and time invested with built-in progress tracking. Whether you're preparing for finals, studying for the MCAT, or learning new material, NoteOak adapts to your needs. Our AI understands educational content and creates study materials that actually help you learn. Powered by Claude and GPT-4, NoteOak uses cutting-edge AI to analyze your documents and create high-quality study materials. The problem solver uses advanced vision AI to understand handwritten notes, textbook problems, and complex diagrams. Start free with 33 AI credits daily. All core features are included with no credit card required, perfect for casual studying. Upgrade to NoteOak Plus for unlimited learning. Get unlimited AI credits so you can generate as much as you need. Enjoy priority processing for faster AI responses and access to all future premium features. Try it free for 3 days, then just $9.99 per month or $49.99 per year and save 58%. Getting started is simple. Upload any PDF or photo of your study material. Choose what you want to generate like summaries, flashcards, or quizzes. Study using our interactive learning tools. Track your progress and build study streaks. Your documents are processed securely and never used to train AI models. Sign-in is optional because the app works fully without an account. Create an account only if you want to sync across devices. Build momentum with daily study streak tracking. See your improvement over time with accuracy metrics. Quiz yourself or review flashcards with multiple study modes. Understand your mistakes immediately with instant feedback. Study anywhere, even without internet thanks to offline access. NoteOak is perfect for college students preparing for exams, medical students studying complex material, high school students building study habits, graduate students managing heavy reading loads, and anyone who wants to study smarter, not harder. Start studying smarter today with NoteOak. Download free and get 33 daily AI credits to try all features. Upgrade anytime for unlimited access.

Screenshots

PDF Notes S4 screens
NoteOak4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on June 10, 2026 and July 18, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Notes S versus NoteOak: the parameters behind the verdict, then further details
ParameterPDF Notes SNoteOak
PriceFreeFree
Rating4.2 (5 ratings)5.0 (6 ratings) — better
Positive reviews52.9% of reviews100.0% of reviews — better
Number of ratings56 — better
Update frequencyEvery 6 weeksEvery 6 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size22 MB42 MB
Age rating4+4+
DeveloperAMuseTec Co., Ltd.WATTS LABS LLC

Customer experience

PDF Notes S

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews17 reviews
Positive52.9%
Neutral35.3%
Negative11.8%

NoteOak

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

PDF Notes S

Subscriptions2
  • Monthly Plan$0.991 Month
  • Yearly Plan$9.991 Year
2 purchases

NoteOak

Subscriptions2
  • NoteOak Plus3 Days trial$9.991 Month
  • NoteOak Plus3 Days trial$49.991 Year

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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