Comparison

Highlights vs Allume

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

Head to head
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

About

Allume

This app provides a digital canvas for organizing thoughts and ideas. It allows users to create nested boards, link content, and combine various media types like text, images, and PDFs. Collaborate with others in real-time on shared workspaces.

Highlights
  • Nested boards for deep ideation
  • Linked cards for referencing
  • Remixing content from PDFs and images
  • Unified canvas for text, ink, and files
  • Real-time collaboration with shared workspaces
  • PDF annotation and export
Features
Read full description

Allume (formerly Muse) is a canvas for thinking that helps you get clarity on things that matter. Think in private or collaborate with others. BEYOND WHITEBOARDS with nested boards Each Muse board is like a whiteboard that can hold even more whiteboards. Your boards grow organically over time as you develop an idea. Stay in the ideation flow, worry about organizing later. REFERENCE & REMIX with linked cards & excerpts Linked cards let you reference boards from multiple places. And excerpts let you remix parts of PDFs and images without losing the context of the source. Grow your Muse into a space of interconnected whiteboards. ONE CANVAS FOR ANYTHING with ink + text + cards Developing an idea starts with collecting inspiration and stray thoughts. Muse lets you put everything on a single canvas: writing, scribbles, notes, images, videos, PDFs, web links, and any other files. Lay out all the raw materials, then connect the dots with ease. COLLABORATION with shared workspaces Add collaborators to a Muse workspace to plan and strategize together. They'll feel right at home with live cursors, comments, following, and templates. AND PLENTY MORE → Search and quick-jump to boards → Read and annotate PDFs → Create connections between cards → Export boards as PDFs or PNGs → Local-first data with instant sync LEARN MORE Website: https://allume.com/ Community: https://allume.com/community Contact us: hello@allume.com Terms of service: https://allume.com/terms

Screenshots

Highlights4 screens
Allume3 screens

Verdict

The call

Highlights and Allume both sit at 4.5 stars, but that hides the real split: 64% of Allume's written reviews are positive against 53% of Highlights's. Highlights's advantage is ratings volume (1.6K vs 332). On price, rating, update cadence and ads 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. Highlights sells 3 in-app purchases, starting at $4.99 per month and Allume sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Highlights against 4.6 for Allume. Both are backed by a comparable volume of ratings — 1.6K and 332 respectively. Written reviews are what separate them: 53% of Highlights's written reviews are positive against 64% of Allume's.

UpkeepUpdate frequency

Highlights ships an update fortnightly, Allume every 2 weeks. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
Highlights versus Allume: the parameters behind the verdict, then further details
ParameterHighlightsAllume
PriceFreeFree
Rating4.5 (1.6K ratings)4.6 (332 ratings) — better
Positive reviews53.3% of reviews64.4% of reviews — better
Number of ratings1.6K — better332
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac
Requires iOS15.015.0
Further details — not scored
Size37 MB100 MB
Age rating4+4+
DeveloperJonas Myren RibeMilestone Made, LLC

Customer experience

Highlights

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

Allume

All ratings332 ratings
Positive91.0%
Neutral2.7%
Negative6.3%
Written reviews267 reviews
Positive64.4%
Neutral10.1%
Negative25.5%

User reviews

Highlights

From 1.6K App Store ratings

What 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

Allume

From 332 App Store ratings

What we love

  • 👍 Organize ideas and information
  • 🚀 Unique and very cool features
  • 👍 Indispensable app - incredibly well designed
  • 👍 Great thinking and creative tool
  • 👍 Exceptional app

Room to improve

  • 💰 Too expensive subscription price
  • 🔒 Lack of privacy of user data
  • 🔒 Requires email to try
  • 🐛 Bugs are prevalent
  • 🔒 Outrageous pricing

Bugs and 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

Allume

Reported bugs

6 issues
  • Eraser size issues
  • Undo history reset when navigating between boards
  • Crashes when erasing large areas
  • Syncing issues between devices
  • iPhone app not usable without iPad or Mac
Show 1 more
  • Freezing and performance issues

Requested features

7 requests
  • More pen color and workspace options
  • Zoom in/out within a board
  • Search functionality
  • Checklists
  • Support for pen tablets on Mac
Show 2 more
  • Straight line drawing with arrowheads
  • Monthly payment plan

In-app purchases

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
4 purchases

Allume

Subscriptions4
  • Unlimited membership, monthly$9.991 Month
  • Pro membership, monthly$9.991 Month
  • Unlimited membership, yearly$99.991 Year
Show 1 more
  • Pro membership, yearly$99.991 Year

Questions

Is Highlights free?
Highlights is free to download, with in-app purchases available.
Is Allume free?
Allume is free to download, with in-app purchases available.
Which has better reviews, Highlights or Allume?
Allume is rated higher. Highlights averages 4.5 out of 5 from 1.6K ratings, while Allume averages 4.6 from 332 ratings.
Do Highlights or Allume have ads?
Neither Highlights nor Allume shows ads.
Which is updated more often, Highlights or Allume?
Highlights ships an update fortnightly, and Allume every 2 weeks. Most recently, Highlights was updated on September 22, 2026 and Allume on September 24, 2026.

Other comparisons