# How people use Hjarni

Hjarni works best when your AI can read the notes, decisions, and preferences that matter to your work. Explore the audience-specific pages below.

[Hjarni for Personal Life](https://hjarni.com/use-cases/personal)

Keep the people, preferences, and life admin you keep re-explaining in one place so ChatGPT and Claude answer like they actually know you.

[Hjarni for Developers](https://hjarni.com/use-cases/developers)

Keep architecture notes, conventions, runbooks, and debugging context in one place so coding assistants can answer with project-specific memory.

[Hjarni for Teams](https://hjarni.com/use-cases/teams)

Give your whole team one shared knowledge base of decisions, runbooks, and onboarding notes that every teammate's ChatGPT or Claude can read.

[Hjarni for Researchers](https://hjarni.com/use-cases/researchers)

Organize paper notes, hypotheses, methods, and synthesis documents so your AI can help compare sources and extend your actual research trail.

[Hjarni for Students](https://hjarni.com/use-cases/students)

Keep lecture notes, key concepts, and exam questions in one folder per course so ChatGPT or Claude can quiz you from your own notes instead of generic flashcards.

[Hjarni for Founders](https://hjarni.com/use-cases/founders)

Save strategy, customer interviews, investor notes, and decision logs so your assistant answers from company reality instead of generic startup advice.

[Hjarni for Writers](https://hjarni.com/use-cases/writers)

Store style guides, source material, published examples, and reporting notes so your AI can draft with your voice and your context.

[Hjarni for Travelers](https://hjarni.com/use-cases/travelers)

Save travel preferences, past trip notes, and favorite places so your AI plans itineraries around how you actually travel.

[Hjarni for Engineering Managers](https://hjarni.com/use-cases/engineering-managers)

Keep team decisions, process docs, project status, and onboarding notes in one shared place that each engineer’s connected assistant can retrieve.

[Hjarni for Support Teams](https://hjarni.com/use-cases/support)

Keep resolutions, product quirks, policies, and escalation paths in one knowledge base so every agent's ChatGPT or Claude answers from the same source of truth.

[Hjarni for Agencies](https://hjarni.com/use-cases/agencies)

Keep per-client context, brand voice, decisions, and deliverables in one place so your team's AI answers for each client without a re-brief, and new people ramp fast.

## Your notes on every device

**Hjarni has its own native apps.** Free on every plan for [iPhone, iPad and Apple Silicon Mac](https://apps.apple.com/app/id6761733903) and [Android](https://play.google.com/store/apps/details?id=com.hjarni.app). Same account, same notes as the web. An internet connection is required.