kOS 4+

Unlock the potential of PDFs

Helper Systems LLC

    • 5.0 • 8 Ratings
    • Free
    • Offers In-App Purchases



kOS is a superior research tool that provides proof of work. Access all premium features with our free 6-month trial period, then subscribe or revert to the free version.

Introducing kOS (pronounced ‘chaos’)

With kOS, you can use AI responsibly and show proof of work:
• create searchable databases of PDF files from your desktop, shared drives, and the Web;
• explore faster using a global table of contents and page thumbnails, and a list of favorites;
• discover more using Phrase Builder and Word Cloud to reveal hidden information gems;
• take notes and make highlights easily, or import them with your annotated documents;
• cite automatically upon copy and paste, with hyperlinks back to your source documents;
• use AI to create summaries and ask specific research questions about your own content;
• create instant presentations to show that you did the work, using AI only to assist you.

Never lose your work and never lose your sources.

View our Terms of Service at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

What’s New

Version 1.2.1

There are many stability, usability, and performance improvements.

• chat interactions with the AI are now remembered in your kBases;
• chat interactions can now be copied, shared, or sent to Apple Notes;
• document summaries can now be copied, shared, or sent to Apple Notes;
• presentations can now be displayed in true full screen mode;
• presentations can now be exported to PDF, with one slide per page.

Ratings and Reviews

5.0 out of 5
8 Ratings

8 Ratings

Jawrugger ,

This is clearly a work of passion

When I first downloaded it, I was struck. No ads, no data collected, and working entirely on my mac. I thought, this is what I've wanted for years and nobody has had the guts to build! The way I've set it up, it's like my own personal intranet, so that I can summarize and discover in any PDF I find. I'll be looking very much forward to subsequent versions, I really want to see where this goes.

3PC0 ,


This app does not collect any data? It essentially allows you to create a library from your PDF files. Organized into user defined subject level databases.

Finally something useful to do with the all of the PDF Files I have been hoarding.

FashionMaven ,

Beautiful, original idea

This is fundamentally a new paradigm for file organization and interaction. Only just beginning to unlock this new motion in my routines but excited to organize my PDFs and make this part of my workflow/funflow/readingflow!

App Privacy

The developer, Helper Systems LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More