Paperpile vs Highlights
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Paperpile
Organize and manage your research papers effortlessly. Collect, read, and annotate PDFs from millions of academic journals. Beat paper chaos with a tidy digital library.
- Search millions of academic papers
- Collect PDFs with one tap
- Organize with folders and labels
- Read and annotate PDFs
- Highlight and add notes
- Browser integration for saving
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Get a head start for you research and finally beat the paper chaos on your desk. With Paperpile you have all your research PDFs in one place — nice and tidy. Paperpile makes it easier than ever to collect, manage, read, and annotate your papers. FIND & COLLECT - Search millions of papers from 20,000+ academic journals right in the app. - Add new papers to your collection with one tap and the PDF will be downloaded automatically. - Save directly from your browser to your Paperpile library - User your university's off-campus proxy access to get restricted content behind paywalls. MANAGE & ORGANIZE - Bring structure to your library with folders and subfolders - Organize your library visually with colored labels - Mark important papers with stars. - Search your library to find the paper you need fast. READ & ANNOTATE - Read like on paper with a fast and slick PDF viewer experience - Highlight important sections in different colors - Add notes and never forget an important idea. - Add hand-drawn annotations - with your fingers or your Apple Pencil The Paperpile App requires a Paperpile account.
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.
- 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
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"... 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
Verdict
The clearest difference is in-app purchases: Paperpile at none against Highlights's 3. Paperpile also leads on review sentiment (72% vs 53%) and iOS requirement (12.0 vs 15.0). Highlights's advantage is update cadence (fortnightly vs every 2 months) and ratings volume (1.6K vs 129). On price, rating, 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
Both are free to download. Highlights sells 3 in-app purchases, starting at $4.99 per month. Paperpile asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.5 for Paperpile against 4.5 for Highlights. That said, the two scores are not equally well evidenced: Highlights has 1.6K ratings behind it against 129, so its average is the more settled of the two. Written reviews are what separate them: 72% of Paperpile's written reviews are positive against 53% of Highlights's.
Paperpile ships an update every 2 months, Highlights fortnightly. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.
| Parameter | Paperpile | Highlights |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (129 ratings) | 4.5 (1.6K ratings) |
| Positive reviews | 71.6% of reviews — better | 53.2% of reviews |
| Number of ratings | 129 | 1.6K — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 242 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Paperpile LLC | Jonas Myren Ribe |
Customer experience
Paperpile
Highlights
User reviews
Paperpile
From 129 App Store ratingsWhat we love
- 👍 Excellent reference library management
- 🔄 Seamless cross-device synchronization
- ✍️ Intuitive PDF annotation and highlighting
- 🎨 Clean and minimalist user interface
- 📱 Strong iPad and mobile integration
Room to improve
- 🐛 Frequent crashes and instability
- ⏱️ Lack of updates for extended periods
- 📱 Mobile app significantly behind web version features
- 🔋 High battery drain on iPad
- 🌙 No dark mode support
Highlights
From 1.6K App Store ratingsWhat we love
- 🚀 Great for highlighting and annotating PDFs
- 🔍 Effective for research and note-taking
- 📚 Useful for academic and professional work
- 👍 Clean and intuitive user interface
- 🔗 Good integration with other apps and cloud storage
Room to improve
- 💰 Subscription model is too expensive
- 🐛 Frequent crashes and bugs
- 🔍 Limited search functionality
- 🔒 Lack of customization options
- 🔧 Poor customer support and unresponsive developers
Bugs and requests
Paperpile
Reported bugs
12 issues- App crashes frequently on iPad and iOS devices
- Highlighting disappears when revisiting papers
- Overlapping annotations delete together when removing one
- Sync failures requiring logout/login cycles
- Annotations not syncing between iPad and web versions
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- PDF metadata recognition failures when adding papers
- Settings reset when returning to previously edited files
- App incompatible with older iOS versions (iOS 12)
- Login authentication errors with university accounts
- App crashes without reliable internet connection
- Search functionality broken after updates
- Annotations not saving/loading on iOS 14.4.2
Requested features
17 requests- Dark mode implementation
- Edit citation metadata on mobile app
- Change PDF file functionality
- Save to downloads feature
- Dictionary/lookup function for reading
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- Cite while you write feature
- BibTeX export capability
- Ability to upload PDFs directly from mobile app
- Support for Safari and other browsers
- Desktop application version
- Shared library access in mobile app
- Advanced sorting options (by title, author, date)
- Custom color options for annotations
- Paste images into PDFs
- Shape snapping for drawing tools
- University email authentication
- Paper rating system beyond stars
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
Paperpile
No in-app purchases
Highlights
- Highlights Pro: Monthly$4.991 Month
- Highlights Pro14 Days trial$29.991 Year
- Highlights Pro: Legacy Upgrade1 Year trial$29.991 Year









