Comparison

pdf vs Highlights

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

Head to head
About

pdf

This app allows you to read and annotate PDF files on your iPhone with fast page turning and convenient finger-writing tools. Easily import PDFs and share your notes via email or cloud services.

Highlights
  • Fast PDF display and page turning
  • Finger-writing and annotation tools
  • Import PDFs via Dropbox, Email, iTunes
  • Categorized bookshelves with search
  • Export annotated PDFs
  • Password-protected bookshelves
Features
Read full description

Utilize pdf-notes to read pdf files on your iPhone. The fastest and convenient pdf-notes for iPad is now available for iPhone. 1. Fast display, quick page-turning even a thousand pages 2. Convenient finger-writings 3. Sharing notes by mail or clouds. - Categorized multiple bookshelves(booklists) with powerful search - Easy importing PDF files through (DropBox, Email or Safari's) "Open In..." or iTunes - Finger-writing with a variety of pens, highlighters, drawings, sticky or text notes - Outlines and bookmarks - Exporting annotated PDF files to mail or clouds - Protected bookshelves by a password - External display and AirPrint * please visit the support site for more information http://bit.ly/1gBUQV1 Blog http://bit.ly/1992293 Email musebook@musebook.com Twitter http://twitter.com/musebook4u YouTube http://youtu.be/_60pvYx6pT4 NOTE: All content contained herein is subject to change without notice.

About

Highlights

This app is a fast and lightweight PDF reader designed for research. It allows users to read, highlight, and annotate documents, and then extract this information into organized notes. Advanced features include table data extraction, text recognition, and smart copying of annotations into various formats.

Highlights
  • Read and browse PDF documents
  • Highlight, underline, and strikethrough text
  • Add comments and sticky notes
  • Extract annotations into organized notes
  • Convert table data and recognize text
  • Smart copy annotations to various formats (CSV, BibTex)
  • Lookup citation metadata and DOI links
Features
Read full description

"... an app that students, academics, and anyone who does substantial amounts of PDF-based research should try" - Macstories.net "It’s the novel approach to PDF annotation that makes this app a cut above the rest"- TapSmart.com *** "App of the Day" - App Store, US *** USE HIGHLIGHTS FOR FREE Highlights is a fast and lightweight PDF reader (under 10MB) packed with features to help you do your best research. Free users have access to standard PDF reader features including document browsing, reading and annotating. There are NO ADS, time limits or tracking. READ PDF DOCUMENTS • Open PDF documents from anywhere • Browse files using the familiar document browser • Open PDFs in Single Page or Two Page scroll mode • Double tap to Smart Zoom in on a paragraph or figure • Scrub smoothly to the desired page • Search the entire document in an instant • Navigate using any connected keyboard or mouse STORE YOUR FILES WHERE YOU WANT • Full support for "Open In Place" lets you make edits to the file where it is • Access your files from iCloud Drive, Dropbox, Google Drive, OneDrive or Box using the document browser • Or keep them privately on device only HIGHLIGHT AND ANNOTATE FASTER • Select text with your finger, Apple Pencil or mouse pointer • Highlight, underline, strikethrough text and make image selections • Add comments to annotations or as individual sticky notes • Annotate with fewer taps using context aware popovers • Default annotation colors prevents you from having to repeatedly setting the color for the same type of annotation every time TURN ANNOTATIONS INTO NOTES • As you markup text and images the contents are extracted and sorted into notes • Customize the formatting and contents of your notes • Sort the annotations chronologically or create your own color coding EXTRACT TABLE DATA AND RECOGNIZE TEXT • Convert images containing text or tables to actual text and tables using machine learning - letting you get to the underlying data with a single tap SMART COPY Copy annotations to the desired format with one tap: • Text markup as text • Image selections as images • Tables as CSV • Citations as BibTex LOOKUP CITATIONS • Highlights will fetch DOI-links and metadata • Markup any reference and tap the link icon to look it up • If you have read the work already or have it in your reference manager library, Highlights will link you to it EXPORT ANYWHERE • Save or share your notes as portable files: Markdown, TextBundle, HTML, WebArchive or PDF • Share them to your favorite notes app: Apple Notes, Bear, Craft, Evernote, DEVONThink, Keep It, MindNode, Notion, Obsidian, Roam Research or Ulysses • Or send them to a colleague via mail. It's your notes, you decide where they go MUCH MORE • Dark mode • Multi-window support on iPadOS • Keyboard shortcuts and navigation • Support for system Copy and Undo gestures • Alternative app icons • Custom accent colors • Apple Pencil double-tap gestures • Power annotation tools For a full list of features see: highlightsapp.net/features HIGHLIGHTS PRO The Highlights Pro subscription unlocks advanced features on your iPhone, iPad and Mac: • Export options for other apps and easily editable formats • Extract information using table and text recognition • Customize accent colors and alternative app icons • Power annotation tools • Citation lookups • Smart Copy Highlights Pro includes a 14-day free trial. You can cancel your subscription at any time. The subscription will automatically renew unless auto-renew is turned off within 24-hour prior to the end of of the current period. Payments will be charged to your iTunes account and your account will be charged within 24-hours prior to the end of the current period. Any unused portion of a free trial period will be forfeited when you purchase a subscription. For more information about Highlights Pro: highlightsapp.net/pro Privacy Policy: highlightsapp.net/privacy Terms of Use: highlightsapp.net/terms

Screenshots

pdf4 screens
Highlights4 screens

Verdict

The call

The clearest difference is rating: Highlights at 4.5 against pdf's 4.0. Highlights also leads on ads (none vs shown) and ratings volume (1.6K vs 17). On price, review sentiment, 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. pdf sells 3 one-off in-app purchases and Highlights sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Highlights holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Highlights has 1.6K ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 49% of pdf's written reviews are positive against 53% of Highlights's.

UpkeepUpdate frequency

pdf ships an update every 5 weeks, Highlights fortnightly. The most recent releases landed on September 26, 2026 and September 28, 2026 respectively.

Scorecard5 real differences · 5 level
pdf versus Highlights: the parameters behind the verdict, then further details
ParameterpdfHighlights
PriceFreeFree
Rating4.0 (17 ratings)4.5 (1.6K ratings) — better
Positive reviews48.6% of reviews53.3% of reviews — better
Number of ratings171.6K — better
Update frequencyEvery 5 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPad, iPod, Mac — better
Requires iOS16.015.0 — better
Further details — not scored
Size109 MB37 MB
Age rating4+4+
DeveloperAMuseTec Co., Ltd.Jonas Myren Ribe

Customer experience

pdf

All ratings17 ratings
Positive76.5%
Neutral11.8%
Negative11.8%
Written reviews70 reviews
Positive48.6%
Neutral14.3%
Negative37.1%

Highlights

All ratings1,610 ratings
Positive88.2%
Neutral3.7%
Negative8.1%
Written reviews465 reviews
Positive53.3%
Neutral15.3%
Negative31.4%

Bugs and requests

pdf

Not enough reviews yet to summarise bugs or requests.

Highlights

Reported bugs

5 issues
  • Highlights and annotations randomly disappearing
  • Text selection issues, especially with footnotes
  • Compatibility problems with certain PDF files
  • Syncing issues across devices
  • Export functionality not working as expected

Requested features

5 requests
  • Add handwriting and freeform annotation support
  • Implement a table of contents or bookmarking feature
  • Allow editing of notes directly in the app
  • Provide a one-time purchase option instead of subscription
  • Improve search capabilities with visual results and navigation

In-app purchases

3 purchases

pdf

One-time3
  • 2-Month Pass$0.99
  • 1-Year Path$2.99
  • Lifetime License$4.99
3 purchases

Highlights

Subscriptions3
  • Highlights Pro: Monthly$4.991 Month
  • Highlights Pro14 Days trial$29.991 Year
  • Highlights Pro: Legacy Upgrade1 Year trial$29.991 Year

Questions

Is pdf free?
pdf is free to download, with in-app purchases available.
Is Highlights free?
Highlights is free to download, with in-app purchases available.
Which has better reviews, pdf or Highlights?
Highlights is rated higher. pdf averages 4.0 out of 5 from 17 ratings, while Highlights averages 4.5 from 1.6K ratings.
Do pdf or Highlights have ads?
pdf shows ads; Highlights does not.
Which is updated more often, pdf or Highlights?
pdf ships an update every 5 weeks, and Highlights fortnightly. Most recently, pdf was updated on September 26, 2026 and Highlights on September 28, 2026.

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