Comparison

DEVONthink To Go 4 vs Kagi Summarize

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

Head to head
About

DEVONthink To Go 4

Manage your entire knowledge library on your iPad and iPhone. Organize, edit, and annotate documents, notes, and more. Leverage generative AI for summaries, content creation, and advanced search. Syncs privately and securely across devices.

Highlights
  • Document organization and management
  • AI-powered summaries and content creation
  • PDF annotation and editing
  • On-device OCR for searchable documents
  • Cross-device secure synchronization
  • Custom metadata and tagging
  • Shortcuts automation
Features
Read full description

Your entire knowledge library. Always with you. Always private. DEVONthink To Go is your document repository when you're not at your Mac. Collect, organize, edit, and annotate. Use generative AI to work with your stored knowledge or create new documents. Automate with Shortcuts. Our time-tested technology keeps all your data in sync between your Mac, iPad, and iPhone, privately and securely. The professional document and information manager for iPad and iPhone. From DEVONtechnologies, driving innovation since 2002. - Students: Annotate research papers with AI-powered summaries - Teachers: Organize your materials, use AI to create handouts and tests - Researchers: Have your data with you in a robust, powerful knowledge manager - Lawyers: Keep all case files organized and encrypted Have your important documents with you at all times: - Never lose an important document again, keep everything organized - Store PDFs, notes, images, bookmarks, just about any type - File your documents in groups, even more than one group at a time - Use tags, mark documents with flags or as unread, give them a star rating - Versioning lets you return to a previous state of a document - Revision-proof databases prevent edits to documents with special requirements - Sync your data between Macs, iPads, and iPhones, securely and privately Work with your documents: - Edit texts, Markdown files, or rich text documents - Annotate and edit PDFs with common tools - Make scans, scanned PDFs, or images searchable with the built-in, on-device OCR - Add custom, searchable metadata fields to enrich your documents Use generative AI: - Work with your favorite provider and model - Chat with your documents, analyze or summarize them - Transform text or extract text from images and even handwritten notes - Create new images from your data - Find documents using natural language with the AI-powered search assistant - Let the AI make order from chaos, rename documents, add tags, or label or rate them DEVONthink To Go is well-integrated with other apps: - Link to your documents from other apps with universal links - Access all your documents also through the Files app - Clip data from almost any app with the Clip to DEVONthink extension - Use drag-and-drop, inside DEVONthink To Go or between apps - Automate repetitive tasks with Shortcuts actions DEVONthink To Go is great standalone but also works perfectly with DEVONthink for Mac and across multiple devices. Synchronize your databases securely and privately over the local network or through a cloud service of your choice. You decide what data is synced, when, and where. Strong encryption makes sure that your data belongs to you, not to your service provider or us. Privacy policy: https://www.devontechnologies.com/r/privacy End user license agreement: https://www.devontechnologies.com/r/eula

About

Kagi Summarize

Instantly transform web articles into tailored summaries that match your reading style and preferences. Choose from multiple summary formats and languages for a personalized content experience. Optimize your reading and expand your knowledge with this intelligent content companion.

Highlights
  • Instant article summaries
  • Multiple summary formats
  • Multilingual content recreation
  • Adaptive summary lengths
  • Unique reading modes
  • Private and no telemetry
Read full description

Transform any web article into perfectly tailored summaries that match your reading style and preferences with Kagi Summarize - your content companion! Key Features: • Instant article summaries in multiple formats • Multilingual intelligent recreation of content • Adaptive summary lengths • Unique reading modes • No telemetry, 100% private Summary Styles: • Quick Snapshot • Comprehensive Overview • Bullet Point Highlights • ELI5 (Explain Like I'm 5) Multilingual Magic: • Transform any article into a culturally adapted summary in your preferred language! How It Works: • Share any web article URL from Share Sheet • Choose your preferred summary style and language • Get your perfectly tailored summary in seconds • Powered by Kagi Perfect for: • Students • Professionals • Lifelong learners • Curious minds Download now and enjoy our app free while in beta for quality summaries you can count on. Optimize your reading, expand your knowledge! Privacy policy: https://kagi.com/privacy

Screenshots

DEVONthink To Go 44 screens
Kagi Summarize4 screens

Verdict

The call

DEVONthink To Go 4 and Kagi Summarize both sit at 4.7 stars, but that hides the real split: 91% of Kagi Summarize's written reviews are positive against 43% of DEVONthink To Go 4's. Kagi Summarize also leads on in-app purchases (none vs 2) and update cadence (every 10 days vs every 3 weeks). DEVONthink To Go 4's advantage is ratings volume (226 vs 25). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DEVONthink To Go 4 sells 2 in-app purchases, starting at $2.99 per month. Kagi Summarize asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for DEVONthink To Go 4 against 4.8 for Kagi Summarize. That said, the two scores are not equally well evidenced: DEVONthink To Go 4 has 226 ratings behind it against 25, so its average is the more settled of the two. Written reviews are what separate them: 43% of DEVONthink To Go 4's written reviews are positive against 91% of Kagi Summarize's.

UpkeepUpdate frequency

DEVONthink To Go 4 ships an update every 3 weeks, Kagi Summarize every 10 days. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

Scorecard6 real differences · 4 level
DEVONthink To Go 4 versus Kagi Summarize: the parameters behind the verdict, then further details
ParameterDEVONthink To Go 4Kagi Summarize
PriceFreeFree
Rating4.7 (226 ratings)4.8 (25 ratings) — better
Positive reviews42.9% of reviews90.9% of reviews — better
Number of ratings226 — better25
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size191 MB33 MB
Age rating17+12+
DeveloperDEVONtechnologies, LLCKagi Inc.

Customer experience

DEVONthink To Go 4

All ratings226 ratings
Positive92.5%
Neutral2.7%
Negative4.9%
Written reviews28 reviews
Positive42.9%
Neutral21.4%
Negative35.7%

Kagi Summarize

All ratings25 ratings
Positive96.0%
Neutral0.0%
Negative4.0%
Written reviews11 reviews
Positive90.9%
Neutral0.0%
Negative9.1%

In-app purchases

2 purchases

DEVONthink To Go 4

Subscriptions2
  • Monthly1 Month trial$2.991 Month
  • Yearly1 Month trial$19.991 Year
None

Kagi Summarize

No in-app purchases

Questions

Is DEVONthink To Go 4 free?
DEVONthink To Go 4 is free to download, with in-app purchases available.
Is Kagi Summarize free?
Kagi Summarize is free to download, with no in-app purchases.
Which has better reviews, DEVONthink To Go 4 or Kagi Summarize?
Kagi Summarize is rated higher. DEVONthink To Go 4 averages 4.7 out of 5 from 226 ratings, while Kagi Summarize averages 4.8 from 25 ratings.
Do DEVONthink To Go 4 or Kagi Summarize have ads?
Neither DEVONthink To Go 4 nor Kagi Summarize shows ads.
Which is updated more often, DEVONthink To Go 4 or Kagi Summarize?
DEVONthink To Go 4 ships an update every 3 weeks, and Kagi Summarize every 10 days. Most recently, DEVONthink To Go 4 was updated on September 23, 2026 and Kagi Summarize on September 10, 2026.

Other comparisons