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Hjarni

Stores plans, decisions and preferences as markdown notes that ChatGPT and Claude can search and edit across chats.

Free plan · From $12/moActively maintained

KnowledgeFree tierFor developers
hjarni.com ↗XLinkedInYouTube
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At a glanceswept Oct 13, 2026

≈ 35visits/mo

Little sign of use · estimate, read Oct 13, 2026

For
People using ChatGPT or Claude who want plans and preferences remembered across new chats
Price
Free plan · From $12/mopricing page, read Oct 19, 2026Trial & discounts: student discount
Activity
Actively maintainedrelease 2 days ago · site updated 8 days ago
Company
since 2026per their site
Runs as
Mobile app
App Store
51 ratingsiPhone & iPad · updated Oct 18, 2026
Used for
  • save launch plans and decisions for later chats
  • have Claude update an existing note as plans change
  • pick up a project in a new ChatGPT conversation
read off hjarni.com on Oct 19, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 19, 2026

Free plan · From $12/mo

Trial & discounts student discount

pricing page

The companyeach fact with its source · read Oct 19, 2026
Your datawhat they publish, each line with its page · read Oct 19, 2026

“We do not use your notes or their content for training AI models, analytics, advertising, or any purpose other than showing them back to you (and to AI assistants you connect via MCP or the API).”

privacy policy ↗

These are Hjarni's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 19, 2026
  • MCP servercom.hjarni/hjarniverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-19
  • Address to connecthjarni.com/mcp
  • OpenAPI spec34 pathsthe spec ↗
  • MCP docshjarni.com/blog/what-ai-does-with-write-accessthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Knowledgeby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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From people who use itnot part of the reading

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Questions this page answers
  • What is Hjarni?

    Stores plans, decisions and preferences as markdown notes that ChatGPT and Claude can search and edit across chats. It is listed in the Atlas under Knowledge.

  • Who is Hjarni for?

    People using ChatGPT or Claude who want plans and preferences remembered across new chats

  • How much does Hjarni cost?

    Hjarni has a free plan; paid plans start at $12/mo, per its pricing page on 2026-10-19.

  • Is Hjarni free?

    Yes, Hjarni has a free plan, per its pricing page on 2026-10-19.

  • Do people use Hjarni?

    Little sign of use: ≈ 35 visits/mo · estimate, 2026-10.

  • Is Hjarni still maintained?

    Actively maintained: release 2 days ago · site updated 8 days ago.

  • Does Hjarni train AI on your data?

    No, per its privacy policy (2026-10-19): “We do not use your notes or their content for training AI models, analytics, advertising, or any purpose other than showing them back to you (and to AI assistants you connect via MCP or the API).”

  • Is Hjarni safe?

    We do not audit vendors. What Hjarni publishes, read 2026-10-19: SOC 2 Type I, ISO 27001, HIPAA, GDPR, PCI DSS stated on its security page; on training with your data, “We do not use your notes or their content for training AI models, analytics, advertising, or any purpose other than showing them back to you (and to AI assistants you connect via MCP or the API).”.

  • Does Hjarni have an iPhone app?

    Yes: “Hjarni Notes: AI Memory” on the App Store, rated 5 from 1 ratings; current version released 2026-10-18.

  • Does Hjarni have a student discount?

    Yes, its pricing page names a discount for students (2026-10-19).

  • How do I cancel Hjarni?

    In its own words (terms of service, 2026-10-19): “You can cancel your subscription at any time.”

  • Is Hjarni HIPAA compliant?

    Hjarni states HIPAA compliance on its security page (2026-10-19). We have not verified it.

  • What are alternatives to Hjarni?

    In Knowledge, by use: ChatExport, NeverWrite, Nibomo, thredly, General Catalyst, Mindlify.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk