Comparison

LightPDF vs Bookworm Library

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

Head to head
About

LightPDF

This app offers a comprehensive suite of tools for managing PDF documents on your mobile device. It leverages AI to summarize, chat with, and convert PDFs, along with scanning capabilities, text extraction, and editing features. It also includes an ID photo maker and watermark removal.

Highlights
  • AI Chat with PDFs
  • Phone Scanner to PDF
  • PDF to Word/JPG/Excel Converter
  • OCR Text Extraction
  • PDF Editing and Annotation
  • ID Photo Maker
  • Watermark Removal
Features
Read full description

LightPDF, AI-powered, is a must-have PDF toolkit for your mobile device. You can use it to summarize and chat with PDFs and other documents, and quickly get the key information from the files! And it takes advantage of AI to help you easily scan paperwork to PDFs, extract texts and remove specific objects. It can be your PDF converter, editor, reader, on-the-go mobile scanner, cloud-based PDF storage, and ID photo maker. Try LightPDF to convert, OCR, scan, edit, read, annotate, comment, compress, and merge PDFs easily and quickly to get a high-quality result. And its sharing and collaborating feature can help you communicate smoothly with your colleagues on the same PDF document, and improve your teamwork productivity. What LightPDF can do: Smart AI Chat Assistant for PDFs - Ask questions to the chatbot about your file and it will answer you with cited sources - Quickly output results in markdown and table formats - Chat with PDFs, scans, Excel, Word, PPT, and ePub documents Intelligent Phone Scanner - Take photos of your papers, cards, books, and more to turn them into PDF format. Work as your pocket PDF scanner - Extract and copy texts from paper works - Remove handwriting from the test paper - Advanced filter features for better scanning result Powerful PDF Converter with OCR - Convert PDF to Word, JPG, PNG, Excel, PPT, and TXT, as well as turn Word, PPT, Excel, JPG, PNG, and CAD formats to PDF - Equipped with OCR technology to recognize and turn PDF scans and photos into docx, xlsx, pptx, pdf, and txt formats - Convert multiple documents at the same time and quickly get your work done Cloud-based PDF Editor & Reader - Edit, sign, and add images to a PDF file - Highlight, draw markups, and insert notes into PDF - Reduce PDF file size with a few touches - Combine multiple PDF documents into one - Read PDFs, add bookmarks, search and annotate - Print PDFs directly from your devices - Auto-sync PDFs in order to work with PDFs on the go. No more worry about losing data Handy ID Photo Maker - Create ID and passport photos with ease. It allows you to remove the background, change the background color, and produce a new photo with the selected size - Unblur the photo to enhance its quality and make it clear Image Watermark Removal - AI automatically recognizes and removes watermarks from images, eliminating the need for manual smudging like in Photoshop. It is particularly effective for large logos and full-screen watermarks, enhancing learning efficiency. New Way for Teamwork - Share files via links with your team and invite multiple people to view, edit, highlight, sign, and add comments on the same PDF at the same time - Set permissions to keep PDF security under control - Upload the file to the cloud, and access it on any device - Star files as favorites to quickly find and open them Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. After purchase, please manage your subscriptions in the App Store Account Settings. ------------------------------------------------------------------------------- If you need any help or have suggestions on LightPDF, please feel free to contact us. We can't keep making progress without your voice. Email: support@lightpdf.com Customer Service Center: https://lightpdf.com/contact FAQ: https://lightpdf.com/faqs/lightpdf-editor-faq Privacy Policy:https://lightpdf.com/privacy Terms of Service:https://lightpdf.com/terms

About

Bookworm Library

Features
Read full description

Never buy the same book twice again. Bookworm is a simple and powerful personal library app for iPhone and iPad that helps you track the books you own and the books you want. Whether you’re browsing a bookstore, visiting a book fair, or hunting through a garage sale, Bookworm lets you check your collection in seconds. Just scan the ISBN barcode to instantly see if a book is already in your library or on your wish list. No more guessing, no more duplicate purchases. Bookworm is ideal for readers, book collectors, and anyone who wants an organised, always available digital record of their book collection. Key Features • Scan ISBN barcodes to quickly look up books • Search for titles and add them to your collection • Mark books as Owned or Wanted • Import your library from a CSV file • Export your lists to CSV for backup or sharing • Create PDFs for Owned books, Wanted books, or your full library Bookworm is the perfect companion for managing your personal library—simple, fast, and always with you.

Screenshots

LightPDF4 screens
Bookworm Library4 screens

Verdict

The call

The clearest difference is in-app purchases: Bookworm Library at none against LightPDF's 13. LightPDF's advantage is update cadence (every 2 weeks vs every 8 months) and iOS requirement (14.0 vs 18.6). On price, ads and device support 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. LightPDF sells 12 in-app purchases, starting at $13.99 per 7 days. Bookworm Library asks for nothing beyond the download.

UpkeepUpdate frequency

LightPDF ships an update every 2 weeks, Bookworm Library every 8 months. The most recent releases landed on October 23, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
LightPDF versus Bookworm Library: the parameters behind the verdict, then further details
ParameterLightPDFBookworm Library
PriceFreeFree
Rating4.1 (54 ratings) — better—
Positive reviews88.4% of reviews—
Number of ratings54 — better—
Update frequencyEvery 2 weeks — betterEvery 8 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better18.6
Further details — not scored
Size113 MB2 MB
Age rating17+4+
DeveloperWangxu Technology Co., LtdAlphaworks

Bugs and requests

LightPDF

Reported bugs

5 issues
  • App requests more money after payment
  • Paid subscription not unlocking features
  • Trial period charged despite cancellation
  • Scans cut off PDF to 3 pages or under
  • Performance issues

Requested features

3 requests
  • iPad support
  • Edit text in the exact same font
  • More advanced editing features

Bookworm Library

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

LightPDF

Subscriptions5
  • LightPDF Weekly Subscription$13.997 Days
  • LightPDF Monthly Subscription2 variants$19.991 Month
  • LightPDF Yearly Subscription$47.991 Year
Show 2 more
  • LightPDF Annual Subscription$49.991 Year
  • LightPDF Yearly Subscription3 Days trial$59.991 Year
One-time7
  • iOS LightPDF - 1 Week$9.99
  • 買一年送一年$79.99
  • 1年購入で1年おまけ$84.99
Show 4 more
  • 2 zum Preis von 1$99.99
  • 3-Year Subscription$99.99
  • Mac LightPDF Lifetime Plan$109.99
  • Buy 3 yrs Get 3 yrs Free$149.99
None

Bookworm Library

No in-app purchases

Questions

Is LightPDF free?
LightPDF is free to download, with in-app purchases available.
Is Bookworm Library free?
Bookworm Library is free to download, with no in-app purchases.
Do LightPDF or Bookworm Library have ads?
Neither LightPDF nor Bookworm Library shows ads.
Which is updated more often, LightPDF or Bookworm Library?
LightPDF ships an update every 2 weeks, and Bookworm Library every 8 months. Most recently, LightPDF was updated on October 23, 2026 and Bookworm Library on October 28, 2026.

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