1. Introduction
Welcome to StillKoi (also known as StillWave), a meditation and wellness mobile application designed to help users improve mindfulness, breathing, and relaxation. This Privacy Policy explains how we collect, use, and protect your information when you use our app on Android and iOS platforms.
By using StillKoi / StillWave, you agree to the collection and use of information in accordance with this policy. We are committed to protecting your privacy and complying with applicable laws, including the General Data Protection Regulation (GDPR), Google Play Developer Policies, and other international privacy standards.
2. Information We Collect
Account Information
- Email address (for account creation and login)
- Username or display name
- Profile picture (predefined avatars only, not user photos)
- Subscription status and purchase history (via RevenueCat)
Health & Wellness Data
- Breathing patterns recorded via the microphone during breathing sessions
- Meditation and breathing session history
- Analysis results (e.g., stress level, breathing rate)
- User preferences for sounds, mixes, and rituals
- Daily mood check-ins and ritual completion data
Audio Data and RECORD_AUDIO Permission
The app requests access to your device's microphone (RECORD_AUDIO permission) to record your breathing sounds during guided breathing exercises. Audio input is processed locally on your device in real time to analyze breathing patterns and stress indicators.
- No permanent audio recordings are stored.
- Only summarized analysis results (e.g., breathing rate, stress level) are saved securely.
- Audio data is never shared with third parties and never uploaded to remote servers.
Analytics & Tracking Data
- PostHog: collects anonymous usage data such as session length, app interactions, and device information.
- Sentry: collects crash reports and error logs to improve app performance (no personal data).
- RevenueCat: manages subscriptions and purchase history securely.
Device and Technical Information
- Device type, model, and operating system version
- App version and session duration
- Device ID and Advertising ID (used for analytics and attribution purposes only)
3. How We Use Your Information
- To provide and personalize meditation and breathing experiences
- To analyze breathing patterns and generate feedback on stress or relaxation
- To manage subscriptions and purchases
- To improve app stability, user experience, and performance
- To understand how users engage with different features through analytics
- To communicate updates, offers, and notifications (if opted in)
4. Data Sharing and Disclosure
- We do not sell or rent your personal data to anyone.
- Audio data is never shared and remains local to the device.
- Anonymized usage data may be shared with analytics and crash monitoring providers strictly for performance improvement.
- Subscription and purchase data are securely processed by RevenueCat.
5. Data Storage and Security
- All user account data is securely stored in Supabase (encrypted at rest and in transit).
- Analytics and crash reports are securely handled by PostHog and Sentry.
- Local data (such as preferences or session history) is stored using the device's secure storage system.
- All communications between the app and our servers are protected with HTTPS encryption.
6. Your Rights and Choices
Under GDPR and other applicable laws, you have the following rights:
- Access and Portability: You can request a copy of your personal data.
- Correction: You can update or correct your information within the app.
- Deletion: You can delete your account at any time via app settings.
- Opt-Out: You can disable analytics tracking in the app's privacy settings.
- Withdrawal of Consent: You can withdraw permission for microphone or data processing at any time in your device settings.
7. Children's Privacy
StillKoi / StillWave is not directed to children under 13 years old. We do not knowingly collect personal information from children under 13. If you believe your child has provided personal data, please contact us immediately so we can delete it.
8. Third-Party Services
We use trusted third-party services that may collect or process data as described below. Each service has its own privacy policy:
- PostHog – App analytics and product insights
- Sentry – Crash reporting and error tracking
- RevenueCat – Subscription and payment management
- Supabase – Secure backend and authentication
- OpenAI – AI-powered content and features
9. Changes to This Policy
We may update this Privacy Policy from time to time. Updates will be posted on this page, and the "Last updated" date will be revised accordingly. We encourage you to review this policy periodically for any changes.
10. Contact Information
If you have any questions, concerns, or requests regarding this Privacy Policy or your data, you may contact us at:
Email:privacy@stillkoi.app
Website: www.stillkoi.app
11. Effective Date
This policy is effective as of November 17, 2025.