Privacy Policy
The short version
- Shizumori is a sound-therapy app for tinnitus relief. It runs entirely on your device.
- There is no account, no sign-in, and no server that stores your data.
- Your settings, sound mixes, and the tinnitus pitch you set during setup stay on your phone.
- We use anonymous usage analytics to improve the app — never your name, email, or any health record.
- We never sell your data, and there is nothing to sell.
This policy explains what Shizumori (“the app”, “we”) does with your information. We built Shizumori to be private by default: a local-first app with no user accounts and no backend database of your personal data.
What stays on your device
Everything you set up and use in the app is stored locally on your phone and is not uploaded to us:
- Your sound preferences, mixes, volumes, and sleep-timer settings.
- The tinnitus pitch / notch frequency you choose during onboarding, and any answers you give in the setup questions.
- Your in-app progress and usage state.
If you delete the app, this data is deleted with it. There is no cloud copy because there is no cloud account.
Anonymous analytics
To understand which features help and where people get stuck, we collect anonymous, aggregate usage analytics (for example: which screens are opened, which sounds are popular, whether onboarding was completed). This is processed by PostHog on our behalf.
These analytics are not tied to your identity. We do not collect your name, email address, phone number, contacts, or any medical or health diagnosis. We do not build an advertising profile of you, and we do not use this data to identify you personally.
Purchases
If you subscribe or buy the full version, the payment itself is handled entirely by Apple (App Store) or Google (Play Store) — we never see or store your card details. We use RevenueCat to keep track of whether a purchase or trial is active, using an anonymous app identifier. That tells the app to unlock premium features; it does not reveal who you are.
Health & medical note
Shizumori is a wellness and relaxation tool, not a medical device. It does not diagnose, treat, or cure tinnitus or any other condition, and nothing in the app is medical advice. The tinnitus pitch and any related inputs you provide are used only on your device to shape the sounds you hear — they are never transmitted to us. If your tinnitus is new, worsening, or distressing, please talk to a qualified healthcare professional.
Children
Shizumori is intended for a general adult audience. It is not directed at children, and we do not knowingly collect data from children.
Who processes data for us
We rely on a small number of well-known service providers, each only for the purpose described above:
- Apple & Google — app distribution and payment processing.
- RevenueCat — purchase / subscription status (anonymous identifier).
- PostHog — anonymous product analytics.
Your choices
You can stop all analytics collection at any time by removing the app from your device. Because we hold no account and no server-side profile, there is no separate “delete my account” step — uninstalling removes your local data completely.
Changes to this policy
If we change how the app handles data, we will update this page and revise the effective date above.
Contact
Questions about your privacy? Email us at [email protected].