Comparison

Right PDF Reader vs Noteflow

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

Head to head
About

Right PDF Reader

This application provides robust PDF viewing, annotation, and management tools. It allows users to organize, share, and sign documents with a user-friendly interface and advanced features.

Highlights
  • Fast PDF viewing
  • Annotation tools (highlight, draw, text)
  • Document organization with folders
  • Cloud storage integration (Dropbox, WebDAV)
  • Handwritten signature creation
  • Form filling
  • Password protection
Features
Read full description

Right PDF Reader goes beyond a free PDF reader app. Created by a team of professionals in the PDF software business since 1993, Right PDF Reader has a simple UI that is easy to navigate and more features than average free readers. PDF Viewing - Fast document open speed - Browse lets you view PDFs in the device or iCloud - Supported thumbnail view - View PDF portfolio, comment, attachment and protected document - Single page view or continuous view available - Fit page width or whole page are also available under single page view - Use Day/Night mode to adjust brightness - After tapping page number, you can enter a number and jump to that page directly. - Quickly add and edit Bookmarks and Marks - Search document Note and Comments - Use highlight, cross-out and underline to annotate PDF with customizable color and opacity - Note lets you to add text comment anywhere in PDF - Use Draw Tools to mark up PDF with color, thickness and opacity of your choice. Move and undo are also supported - Batch remove comments Document Management - Create folder to organize PDFs better - Move or copy multiple documents to a folder - Compress multiple documents or folders, or extract any package quickly - Rename document - Attach one or multiple PDFs to an e-mail - Select and delete multiple documents Online Sharing - Get documents in and out of Dropbox - Add WebDAV servers to upload/download documents easily - Access documents in Gaaiho PDF online or upload documents directly to the app (permissions required), breaking the barrier between computer and your iPhone/iPad Handwritten signature - You can create a handwritten signature by drawing, using an image, or taking a photo - Sign anywhere in document Other Features - Fill a form - Use “open in” to share PDF files with other applications - Auto-memorize the point you quitted reading last time - Protect PDF with an open password - Print document

About

Noteflow

This app offers a digital notebook experience designed to replace pen and paper. It allows for note-taking, PDF annotation, sketching, and freeform idea capture with vector ink that scales without quality loss. Seamlessly integrate real-world content and organize your thoughts digitally.

Highlights
  • Digital notebook replacement for pen and paper
  • Annotate PDFs and sketch freely
  • Convert real-world images to vector ink
  • Fluid editing without traditional layers
  • Drag-and-drop integration with iOS
  • Cloud storage synchronization
Features
Read full description

Noteflow is designed to replace pen and paper. It is a modern digital notebook that lets you get the most from your iPad and iPhone. Use it for taking notes, annotating PDFs, sketching and doodling, plus a whole lot more: Copy and paste from the real world: Use Inkport gen 2 to snap a picture of a whiteboard or writing and convert it into Noteflow's native vector ink. No special paper needed. Then resize, re-color, or edit as if you wrote it in Noteflow. Create layered drawings without layers: Use the highlighter tool to color and shade behind existing ink. Use Color-Select to separate and edit individual colors. It's a much more fluid and natural editing experience than with layers. Use the straight-line tool with a grid for fast and intuitive wireframes and drafting. Drag-and-drop, cloud-storage, and more: Noteflow natively integrates with iOS's file system and drag-and-drop capabilities. Drop photos and text into Noteflow, and drag your drawings into other apps. Store your files locally or sync with the cloud service of your choice. Make Noteflow a seamless part of your workflow, the way you like. SPACE FOR YOUR IDEAS TO ROAM Our vision for Noteflow is simple: to be digital pen and paper. The magic of pen and paper is in their versatility. They are useful for so many things, but particularly for the freeform capture of ideas. Noteflow expands upon this quality. You can naturally do all the things you normally do with pen and paper: take notes in meetings or class, and jot down flashes of inspirations on the go. And you can take that to a whole new level: One of Noteflow’s best uses is for "thinking on digital paper": quickly capture key ideas and concepts, then move and organize them on the screen. Noteflow's vector ink engine lets you scale and edit your work without any loss of quality. Your words and drawings remain tack sharp when zoomed in, giving you a huge effective working canvas even on a single page. There are analogues in the physical world, such as sketchnotes or everyday working on a white board, but being able to fluidly edit and move your ideas around the page is something you can only do digitally. When you represent the ideas in your head with your own personal scribbles on the screen, it effectively becomes an extension of your mind - giving you more room to think. We've designed every part of Noteflow to let you intuitively capture and work on your ideas the way you like. Whether it's dropping in existing information, quickly sketching concepts, or assembling polished presentations for others. EVALUATE NOTEFLOW RISK FREE Rather than just read about Noteflow, go ahead and try it out: We've decided to make the Basic Edition completely FREE. The Basic Edition is a full featured note-taking and sketching app. It comes with the Fountain Pen with black ink, photos, and a standard set of 5 popular fonts for text. Books max out at 20 pages each, but you can create as many as you like. NOTEFLOW+ Upgrade instantly at any time to get: + Inkport + Import and annotate PDFs + A customizable, full color palette, + The Marker, Write-Behind Highlighter and Straight Line tools. + Rotate, Cut, Copy, Paste Ink, and Page Management, + Notebooks with unlimited pages, + Page backgrounds and sizes, + An additional 50+ fonts, + And more! Learn more in the in-app Quickstart Guide. DIGITAL TOOLS FOR A DIGITAL AGE I hope you'll find Noteflow a useful part of your workflow, and that you'll discover new ways to do things with it that weren't easy before. We're very proud of the work we've put into Noteflow, but we're also just seen the beginning of what's possible with powerful new digital platforms like the iPad. Our goal is to push these platforms to their limits to craft useful tools. Tools that can help us think a little more clearly, communicate a bit more effectively, and connect with other in new and enriching ways. Thanks for joining us on this journey! -- The App Makers @ Qrayon.

Screenshots

Right PDF Reader4 screens
Noteflow4 screens

Verdict

The call

The clearest difference is review sentiment: Right PDF Reader at 92% against Noteflow's 47%. Right PDF Reader also leads on rating (4.6 vs 4.2). Noteflow's advantage is update cadence (every 6 weeks vs every 11 months) and ratings volume (182 vs 5). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Right PDF Reader holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Noteflow has 182 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 92% of Right PDF Reader's written reviews are positive against 47% of Noteflow's.

UpkeepUpdate frequency

Right PDF Reader ships an update every 11 months, Noteflow every 6 weeks. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 5 level
Right PDF Reader versus Noteflow: the parameters behind the verdict, then further details
ParameterRight PDF ReaderNoteflow
PriceFreeFree
Rating4.6 (5 ratings) — better4.2 (182 ratings)
Positive reviews92.3% of reviews — better46.7% of reviews
Number of ratings5182 — better
Update frequencyEvery 11 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.4 — better
Further details — not scored
Size79 MB14 MB
Age rating4+4+
DeveloperZEON CorpQrayon, LLC

Customer experience

Right PDF Reader

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews13 reviews
Positive92.3%
Neutral7.7%
Negative0.0%

Noteflow

All ratings182 ratings
Positive78.0%
Neutral7.1%
Negative14.8%
Written reviews30 reviews
Positive46.7%
Neutral10.0%
Negative43.3%

In-app purchases

None

Right PDF Reader

No in-app purchases

None

Noteflow

No in-app purchases

Questions

Is Right PDF Reader free?
Right PDF Reader is free to download, with no in-app purchases.
Is Noteflow free?
Noteflow is free to download, with no in-app purchases.
Which has better reviews, Right PDF Reader or Noteflow?
Right PDF Reader is rated higher. Right PDF Reader averages 4.6 out of 5 from 5 ratings, while Noteflow averages 4.2 from 182 ratings.
Do Right PDF Reader or Noteflow have ads?
Neither Right PDF Reader nor Noteflow shows ads.
Which is updated more often, Right PDF Reader or Noteflow?
Right PDF Reader ships an update every 11 months, and Noteflow every 6 weeks. Most recently, Right PDF Reader was updated on September 27, 2026 and Noteflow on September 21, 2026.

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