Effective date: July 10, 2026
These Terms of Use (“Terms”) are an agreement between you and Matthew John Wagner (“we,” “us,” “I”) governing your use of the Headwater iOS application (“the App”). By using the App you agree to these Terms. If you do not agree, do not use the App.
Headwater is a personal wellness educational tool — it is not clinical decision support and does not provide medical advice. It presents published preventive-health guidelines (such as USPSTF recommendations) and evidence summaries, personalized to the profile information you enter, and helps you build healthy habits.
Headwater is not:
No physician–patient relationship is created by using the App. Always discuss health decisions — including screenings, medications, supplements, and any intervention described in the App — with a doctor or other qualified clinician. See the Medical Disclaimer, which is part of these Terms.
Do not use the App to seek help in an emergency. If you are experiencing a medical emergency, call 911. If you are having thoughts of suicide or self-harm, call or text 988 (Suicide and Crisis Lifeline) or go to your nearest emergency room.
You must be at least 18 years old to use the App. The App enforces this during onboarding.
You agree to use the App only for its intended personal, non-commercial, educational purpose. You may not reverse-engineer, resell, or misrepresent the App or its content, and you may not present App content as clinical advice to others.
The App stores your data locally on your device; we do not receive it. See the Privacy Policy. You are responsible for anything you choose to export and share (for example, PDF reports).
The App offers an optional one-time in-app purchase (“Premium Lifetime Unlock,” $4.99 US) that unlocks PDF report export. It is not a subscription and does not renew. Payment is processed by Apple through your Apple ID; refunds are handled by Apple under Apple’s terms (you can request one at reportaproblem.apple.com). You can restore the purchase on a new device with “Restore Purchases.” All evidence and guideline content in the App is free; the purchase only unlocks value-add tooling.
Guideline and evidence content is drawn from published sources (e.g., USPSTF, CDC, NIH) and labeled by evidence tier, including lower-certainty, investigational, and experimental tiers that are clearly marked and, where appropriate, gated behind explicit acknowledgments. Guidelines change; content may lag the newest publications or contain errors. We make no warranty of accuracy, completeness, or fitness for any purpose. Sources are cited so you and your clinician can verify them.
THE APP IS PROVIDED “AS IS” AND “AS AVAILABLE” WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF DATA, ARISING FROM YOUR USE OF THE APP. OUR TOTAL LIABILITY FOR ANY CLAIM WILL NOT EXCEED THE AMOUNT YOU PAID FOR THE APP IN THE TWELVE MONTHS BEFORE THE CLAIM (OR $10 IF YOU PAID NOTHING). Some jurisdictions do not allow certain limitations; these apply to the fullest extent permitted.
Please read this section carefully — it affects your legal rights. Any dispute arising out of or relating to these Terms or the App that we cannot resolve informally (contact worrier.last0f@icloud.com first; most issues can be worked out by email) will be resolved by binding individual arbitration administered by the American Arbitration Association under its Consumer Arbitration Rules. Arbitration will take place in the State of New York or remotely by videoconference at your election, and the AAA’s consumer fee schedule applies. You and we each waive the right to a jury trial and to participate in a class or representative action — claims may be brought only in an individual capacity. Either party may instead bring an individual claim in small-claims court. You may opt out of this arbitration agreement by emailing worrier.last0f@icloud.com within 30 days of first accepting these Terms. Nothing in this section limits rights that cannot be waived or limited under applicable law.
These Terms are governed by the laws of the State of New York, without regard to conflict-of-law rules.
We may update these Terms; material changes will be reflected by a new effective date and noted in the App’s release notes. Continued use after changes means you accept them.
These Terms are between you and us, not Apple. Apple has no obligation to provide support or maintenance for the App and is not responsible for addressing claims relating to it. Apple is a third-party beneficiary of these Terms and may enforce them against you.
worrier.last0f@icloud.com