Terms of Service

Last updated: June 2, 2026

These Terms are a binding agreement between you and the developer of Stack (“we”, “us”, “our”) governing your use of the Stack app (the “App”). By installing or using the App, you agree to these Terms. If you don’t agree, don’t use the App.

1. Eligibility

You must be at least 18 years old to use the App. By using it, you confirm that you are 18 or older.

2. What the App is

Stack is a personal record-keeping and reminder tool. It lets you log and organize information about substances, schedules, supplies, and health metrics that you enter, and it computes conveniences (such as supply projections and “estimated level in your system” curves) from the information you provide.

3. Medical disclaimer — please read

• The App is not medical advice and is not a medical device. It does not diagnose, treat, cure, or prevent any condition.
• Using the App does not create a doctor–patient or any other professional relationship.
• All calculations, projections, “estimated level” curves, reconstitution figures, and reminders are estimates and conveniences, may be inaccurate, and must not be relied upon for medical or dosing decisions.
• Always consult a qualified healthcare professional before starting, stopping, or changing any medication, supplement, hormone, peptide, or protocol. Never disregard professional medical advice because of something you saw in the App.
• In an emergency, contact your local emergency services.

4. No endorsement; legality; acceptable use

• The App is a neutral tool. We do not sell, supply, source, manufacture, prescribe, promote, or recommend any substance, dose, vendor, or protocol. Compound names exist only so that you can label your own records.
• You are solely responsible for the legality, safety, and appropriateness of anything you choose to track, and for how you use the App, in your jurisdiction.
• You agree not to use the App for any unlawful purpose and not to misuse it.

5. Your data and backups are your responsibility

• The App is local-first: your data is stored on your device. If your device is lost, damaged, reset, or the App is uninstalled, your data may be permanently lost.
• Backups are your responsibility. We cannot recover your data or your backup password. Make backups and store the password safely.

6. License

We grant you a personal, limited, non-exclusive, non-transferable, revocable license to use the App for your own personal use, subject to these Terms and the applicable app store’s terms. You may not copy, modify, reverse-engineer, resell, or redistribute the App except as permitted by law.

7. Intellectual property

The App, its design, branding, and content (excluding your own data) are owned by us or our licensors and are protected by law.

8. Third-party services

The App uses on-device components (e.g. Google ML Kit) and features of your operating system. When you share a backup or stack code, the service you choose is governed by its own terms. We are not responsible for third-party services.

9. Disclaimer of warranties

THE APP IS PROVIDED “AS IS” AND “AS AVAILABLE,” WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE APP WILL BE ERROR-FREE, THAT REMINDERS WILL ALWAYS FIRE, OR THAT ANY CALCULATION OR ESTIMATE IS ACCURATE.

10. Limitation of liability

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, HEALTH HARM, OR OTHER LOSS ARISING FROM YOUR USE OF (OR INABILITY TO USE) THE APP, EVEN IF ADVISED OF THE POSSIBILITY. OUR TOTAL LIABILITY WILL NOT EXCEED THE GREATER OF THE AMOUNT YOU PAID FOR THE APP IN THE 12 MONTHS BEFORE THE CLAIM, OR USD $0 IF THE APP WAS FREE. Some jurisdictions do not allow these limits, so they may not fully apply to you.

11. Indemnification

You agree to indemnify and hold us harmless from any claims, damages, or expenses arising out of your use of the App or your violation of these Terms or any law.

12. Termination

You may stop using the App at any time by uninstalling it. We may suspend, modify, or discontinue the App or these Terms as permitted by law.

13. Governing law and disputes

These Terms are governed by the laws of the United States and the state in which the operator is established, without regard to conflict-of-laws rules, and disputes will be resolved in a court of competent jurisdiction there, except where applicable law provides otherwise.

14. Changes

We may update these Terms. Continued use after changes means you accept them. Material changes are reflected by the “Last updated” date.

15. Contact

Stack — hello@trackyourstack.app