Comparison

DEVONthink To Go 4 vs Kagi Assistant

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 Assistant

Access over 30 leading AI models for private, ad-free interactions. Get grounded answers with web access, create custom assistants, and manage conversations with adjustable retention controls. Designed for thinkers, creators, and professionals to enhance problem-solving and research.

Highlights
  • Access 30+ leading AI models
  • Private chat with adjustable retention
  • Create custom assistants
  • Web access for grounded answers
  • Quick and Research Assistant modes
  • Edit prompts and switch models mid-conversation
Features
Read full description

Kagi Assistant combines Kagi Search with 30+ leading AI models, giving you the best of search and AI in one fast, ad-free app. Get current, source-backed answers, choose the right model for any task, and work without ads, tracking, or engagement-driven noise. • Combine Kagi Search with leading AI models Kagi Assistant pairs the world’s best search engine with state-of-the-art AI models for current, source-backed answers. • Choose from 30+ AI models Switch models at any point in a conversation without starting over. • Keep conversations private Your conversations are never used to train AI models, and your account information is never shared with model providers. Threads are deleted after 24 hours by default, with controls for changing retention. • Create custom assistants Configure assistants for research, coding, writing, or other workflows using custom instructions, models, web access, and Kagi Lenses. • Go quick or go deep Use Quick Assistant for straightforward questions or Research Assistant for complex, multi-step investigations. • Work your way Edit prompts, switch models mid-conversation, upload files, and organize threads into folders. Model and feature availability varies by subscription plan. By using Kagi Assistant, you agree to our Privacy Policy and Terms of Use. Privacy Policy: https://kagi.com/privacy Terms of Use: https://kagi.com/privacy#Terms-of-use

Screenshots

DEVONthink To Go 44 screens
Kagi Assistant4 screens

Verdict

The call

The clearest difference is monetization model: Kagi Assistant at free against DEVONthink To Go 4's free with in-app purchases. Kagi Assistant also leads on update cadence (every 10 days vs every 3 weeks) and review sentiment (54% vs 45%). DEVONthink To Go 4's advantage is ratings volume (242 vs 42). On price, rating, ads and in-app purchases 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 and Kagi Assistant sells 1 in-app purchase, starting at $28.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

DEVONthink To Go 4 holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: DEVONthink To Go 4 has 242 ratings behind it against 42, so its average is the more settled of the two. Written reviews complicate that: 45% of DEVONthink To Go 4's written reviews are positive against 54% of Kagi Assistant's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

DEVONthink To Go 4 ships an update every 3 weeks, Kagi Assistant every 10 days. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 5 level
DEVONthink To Go 4 versus Kagi Assistant: the parameters behind the verdict, then further details
ParameterDEVONthink To Go 4Kagi Assistant
PriceFreeFree
Rating4.7 (242 ratings) — better4.5 (42 ratings)
Positive reviews44.8% of reviews53.8% of reviews — better
Number of ratings242 — better42
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size193 MB31 MB
Age rating17+17+
DeveloperDEVONtechnologies, LLCKagi Inc.

Customer experience

DEVONthink To Go 4

All ratings242 ratings
Positive92.6%
Neutral2.5%
Negative5.0%
Written reviews29 reviews
Positive44.8%
Neutral20.7%
Negative34.5%

Kagi Assistant

All ratings42 ratings
Positive85.7%
Neutral4.8%
Negative9.5%
Written reviews26 reviews
Positive53.8%
Neutral11.5%
Negative34.6%

In-app purchases

2 purchases

DEVONthink To Go 4

Subscriptions2
  • Monthly1 Month trial$2.991 Month
  • Yearly1 Month trial$19.991 Year
1 purchases

Kagi Assistant

Subscriptions1
  • Ultimate Monthly$28.991 Month

Questions

Is DEVONthink To Go 4 free?
DEVONthink To Go 4 is free to download, with in-app purchases available.
Is Kagi Assistant free?
Kagi Assistant is free to download, with in-app purchases available.
Which has better reviews, DEVONthink To Go 4 or Kagi Assistant?
DEVONthink To Go 4 is rated higher. DEVONthink To Go 4 averages 4.7 out of 5 from 242 ratings, while Kagi Assistant averages 4.5 from 42 ratings.
Do DEVONthink To Go 4 or Kagi Assistant have ads?
Neither DEVONthink To Go 4 nor Kagi Assistant shows ads.
Which is updated more often, DEVONthink To Go 4 or Kagi Assistant?
DEVONthink To Go 4 ships an update every 3 weeks, and Kagi Assistant every 10 days. Most recently, DEVONthink To Go 4 was updated on October 20, 2026 and Kagi Assistant on October 21, 2026.

Other comparisons