These terms apply when you use the app Lun. They are meant to be short and clear. Lun is provided by Jonas Haug (Haug & Datter), Drammen, Norway.
Lun is a tool for recording migraine and seeing patterns over time. It is not a medical device, and it is not health care.
Last updated · 16 June 2026.
Lun does not make diagnoses and does not give treatment advice. Patterns, numbers and insights in the app are for information only. If you are worried, or with new and serious symptoms, we recommend you contact a doctor or other health professional.
The app may show a calm prompt to contact a doctor for certain symptoms, but that never replaces your own or a professional's judgment.
Lun is provided as is. You use the app at your own risk, and Haug & Datter takes no responsibility for decisions you make based on the content of the app.
Logging in Lun is always free. Lun+ is a voluntary subscription that unlocks extended insight, full history, air pressure, connections and the doctor's report.
· Lun+ Yearly costs NOK 249 per year, and starts with two weeks free.
· Lun+ Monthly costs NOK 39 per month.
The subscription is bought in the App Store, and payment is charged to your App Store account on confirmed purchase. It renews automatically for the same period unless you cancel at least 24 hours before the period ends. You manage and cancel the subscription yourself in your App Store account settings. If you start with a free period and cancel before it ends, you are not charged.
Prices may vary by region and may be adjusted. Any changes are notified in line with App Store rules.
Lun is downloaded from the App Store, and Apple's standard terms for licensing apps apply in addition to these terms.
The app Lun, the name and the design system Lyng belong to Haug & Datter. You get a personal and limited right to use the app. You may not copy, sell or build on it without an agreement.
As far as the law allows, Haug & Datter is not liable for indirect loss, lost data or consequential damages that may arise from use of the app. The app may have interruptions or errors, and we give no guarantee that it is always available or error-free.
We may update these terms. We make material changes clear in the app, and we update the date at the top.
These terms are governed by Norwegian law. Disputes are sought resolved amicably before they are possibly brought before Norwegian courts.
If you have questions about the terms, get in touch with Haug & Datter.
Jonas Haug (Haug & Datter), Drammen, Norway.