1. Information we collect

• Account: email address and password (stored hashed) to create and access your account.
• Tinnitus sound profile: the matched frequency and safe listening level you configure.
• Daily logs: tinnitus distress level, sleep impact, triggers and your text notes.
• Usage history: sound sessions, breathing exercises and saved presets.
• Clinic connection: the referral code you enter to link your account to a partner clinic.
• Personal audio files: your music is processed to build a notched version. Where possible, processing happens on-device.

2. Why we keep this data

To deliver Acu's core services (personalized sound, daily trend views, report generation and optional clinic connection). Without this data these features cannot be provided.

3. Sharing with your clinic

Your data is shared with a clinic only with your explicit consent and only through a referral code, so the specialist can review your trend, reports and assigned program. Without entering a code, your data is never shared with any clinic.

4. Retention and deletion

Data is kept while your account is active. You may delete your account at any time; associated data is removed within a reasonable period, except where the law requires retention.

5. Security

We use technical and organizational measures (encryption in transit, secure password storage, access control) to protect data. No method is fully secure and no absolute guarantee can be given.

6. Your rights

• Access your data and receive a portable copy.
• Correct or complete inaccurate information.
• Request deletion of your account and associated data.
• Decline or disconnect from a clinic at any time.

7. Children

Acu is designed for adults and does not knowingly collect information from anyone under 18.

8. Cookies and analytics

We may use analytics tools to understand how the app is used. This data is aggregated and non-identifying.

9. Changes to this policy

This policy may be updated. Material changes are announced through the app or email, and the "Last updated" date above reflects the latest revision.