PDF Reader vs One Workbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Reader
Edit, convert, and manage PDF documents on your mobile device. This app allows you to directly edit text, scan documents, fill out forms, and secure your files with passwords and watermarks. It also supports OCR to extract text from scans and convert PDFs to various formats.
- Edit PDF text directly
- Convert PDF to Word, Excel, PPT, images
- OCR for text extraction from scans
- Fill and sign PDF forms
- Secure PDFs with passwords and watermarks
- Annotate PDFs with highlights and notes
- Merge and split PDF files
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KDAN PDF, formerly KDAN PDF Reader, is a mobile PDF editor and reader for iPhone, iPad, and Mac. Edit text directly on your device. Then scan, organize, convert, sign, and share your PDFs in one simple and powerful app. Trusted by millions, KDAN PDF connects your workflow across iPhone, iPad, and Mac, making it easy to review, annotate, and finalize documents anywhere. Who Recommends Us? - Featured as “10 Essentials” in Utility on iTunes - Featured in “10 Best PDF Reader Apps For iPhone & iPad 2019” by FOSSBYTES - Featured as “Best Utility App” in App Store Rewind KEY FEATURES PDF EDITOR • Edit and correct any typos directly on PDFs • Merge multiple files into one PDF • Split a large PDF into several small PDFs • Rotate, delete, add, and rearrange pages • Extract pages or images from PDFs • Change PDF background color PDF CONVERTER • Online & Offline PDF converter • Convert PDF to Word, Excel, PPT & image conversions (docx, xlsx, pptx, jpg, png, gif & bmp). • Save webpages and images as PDFs OCR (Optical Character Recognition) • Recognize and extract text from scans • Export OCR results as text or searchable PDFs • Support 50+ languages SIGN, FORM FILLING, SHARE • Fill out & edit PDF forms • Sign on PDFs • Customize and manage signatures SHARE FILES • Get files from KDAN Cloud, iCloud Drive, Dropbox, OneDrive, Google Drive, Evernote, FTP, or WebDAV client • Compress PDFs • Share flatten PDFs • Send faxes directly from within the app PDF SECURITY • Add passwords to lock PDFs • Remove passwords & restrictions from PDFs • Add & remove PDF watermarks • Validate certificates & signatures in PDF documents VIEW FILES • Supports all mainstream file formats, including Vitrium* PDF format (Like University of Phoenix Ebooks) • Text Reflow & Auto Flow • Present a PDF as a slideshow • View multiple PDFs as tabs • Dark mode supported (only for iOS13 & macOS Mojave and later) • Convert text to spoken audio (text-to-speech) ANNOTATE & REVIEW PDF • Annotate PDFs with highlights, underlines, strikeout text, shapes, sticky notes & text boxes • Add pre-designed stamps, including Approved, Sign Here, Confidential, and more • Add custom stamps with time and date information • Insert hyperlinks to external websites, target pages, and email address • Attach audio notes & insert images to PDFs • Turn handwriting into text with Scribble (Available for iPad) • Add handwritten notes to PDFs MANAGE ANNOTATIONS • Save annotations in XFDF format • Remove all annotations in one tap - Recommended by Techradar, Techworm & Softsonic UPGRADE OPTIONS DOCUMENT 365 • Try for $0.00 for 7 days • Access KDAN PDF on Mac, iPhone, iPad, and other platforms. • Annual plan: billed at USD 59.99/year after the 7-day free trial ends • Quarterly plan: billed at USD 19.99/quarter after 3-day free trial ends • Monthly plan: billed at USD 9.99/month after 3-day free trial ends Subscriptions will be charged to your Apple account upon purchase and will auto-renew 24 hours before the current period ends at the same price and duration. Cancellation during the active period is not allowed. Manage your trial and subscription in your Apple account. Terms of service: https://pdf-reader.kdandoc.com/terms-of-service Privacy Policy: https://pdf-reader.kdandoc.com/privacy-policy Got a question? Contact us at helpdesk@kdanmobile.com or check out https://support.kdanmobile.com
One Workbook
This app provides a digital notebook for organizing notes, journals, sketches, and coloring pages. It offers customizable templates for various creative uses, allowing users to write, draw, and import photos. Keep all your creative moments and notes together in one flexible digital space.
- Create notebooks from built-in templates
- Customize notebook covers with titles
- Write and draw directly on pages
- Import photos onto pages
- Save and access notebooks anytime
- Supports multiple brush sizes and colors
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OneWorkbook is a creative digital notebook app that helps you organize notes, journals, sketches, coloring pages, and more in one place. Create a notebook that fits what you want to do, give it a custom title, and start writing or drawing right away. From everyday note-taking to journaling, sketching, coloring, and fun activity pages, OneWorkbook makes it easy to keep everything together in a simple, flexible format. Whether you want a lined notebook, a journal, a sketchbook, a coloring book, or a playful activity notebook, OneWorkbook gives you ready-to-use templates designed for different kinds of creativity and everyday use. Features: - Create notebooks from built-in templates - Customize each notebook cover with your own title - Write and draw directly on the page - Use multiple brush sizes and colors - Import photos onto your pages - Save your notebooks and come back anytime - Keep notes, journals, drawings, and activities together in one app - Use on both iPhone and iPad Template types include: - General notebooks - Journals and diaries - Sketchbooks - Coloring books - Tic Tac Toe activity pages - Special-purpose notebooks like a New Year’s resolution journal OneWorkbook is great for capturing ideas, practicing writing, sketching for fun, keeping a journal, or giving kids and families a creative notebook space they can enjoy together. (Works well with Apple Pencil) Download OneWorkbook and keep your notes, drawings, and creative moments all in one notebook app.
Screenshots
Verdict
The clearest difference is review sentiment: PDF Reader at 81% against One Workbook's 13%. PDF Reader also leads on rating (4.5 vs 1.6) and update cadence (every 2 months vs every 12 months). 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
Both are free to download. PDF Reader sells 10 in-app purchases, starting at $2.99 per month and One Workbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
PDF Reader holds the better App Store score, 4.5 against 1.6. That said, the two scores are not equally well evidenced: PDF Reader has 3.5K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 81% of PDF Reader's written reviews are positive against 13% of One Workbook's.
PDF Reader ships an update every 2 months, One Workbook every 12 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | PDF Reader | One Workbook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (3.5K ratings) — better | 1.6 (10 ratings) |
| Positive reviews | 80.9% of reviews — better | 12.5% of reviews |
| Number of ratings | 3.5K — better | 10 |
| Update frequency | Every 2 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 190 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | Kdan Mobile Software LTD | Maochen Wang |
Customer experience
PDF Reader
One Workbook
Bugs and requests
PDF Reader
Reported bugs
3 issues- Unable to open or access saved files
- Syncing and backup issues
- Compatibility problems with newer iOS versions
Requested features
4 requests- Improved file management and organization
- Better integration with cloud storage services
- More customization options
- Enhanced accessibility features
One Workbook
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDF Reader
- KDAN Cloud$2.991 Month
- Deluxe Business Pack$5.991 Month
- Creativity 3653 Days trial$9.991 Month
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- Document 365 (Month)3 Days trial$9.991 Month
- Deluxe PDF Pack for iPhone$12.993 Months
- Creativity 365 - 3 Months3 Days trial$19.993 Months
- Document 365 (Quarter)3 Days trial$19.993 Months
- Deluxe PDF Pack for iPhone$39.991 Year
- Document 3657 Days trial$59.991 Year
- Upgrade to Premium$2.99
One Workbook
- Unlock all colors$0.99
Questions
Is PDF Reader free?
Is One Workbook free?
Which has better reviews, PDF Reader or One Workbook?
Do PDF Reader or One Workbook have ads?
Which is updated more often, PDF Reader or One Workbook?
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