Privacy Policy

Overview

SISU ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our mobile application.

We believe your health and wellness data belongs to you. Our app is designed to work primarily on-device, and we minimize data collection to only what's necessary to provide the service.

Data We Collect

Session Data

When you use SISU, we store information about your practice sessions locally on your device:

• Session type (breathing, cold, or heat)
• Session duration and completion status
• Session settings (breathing pattern, temperature, etc.)
• Timestamps of your sessions

Health Data

With your explicit permission, SISU may access health data from Apple HealthKit:

• Heart rate measurements during sessions
• Heart rate variability (HRV) data

HealthKit Integration

SISU integrates with Apple HealthKit to provide enhanced insights during your sessions. Important points about our HealthKit usage:

• Raw HealthKit data remains under Apple's control on your device
• Biometric data captured during sessions (heart rate, HRV) is synced to our servers to enable cross-device access and insights
• You can revoke HealthKit access at any time in iOS Settings
• We do not sell, share, or use your health data for advertising

Data Storage

Your session data is stored securely in the cloud:

• Cloud storage: Session data (including routines, session history, and biometrics) is stored securely using Supabase
• Row-level security: Strict access controls ensure only you can access your data
• On-device caching: Data is also cached locally for offline access
• Account deletion: You can delete your account and all associated data at any time from the app settings

We use industry-standard encryption to protect any data in transit and at rest.

Third-Party Services

SISU uses the following third-party services:

• Apple App Store: For app distribution and in-app purchases
• Supabase: For secure cloud storage and authentication of your session data
• Analytics: Anonymous, aggregated usage analytics to improve the app (opt-out available)

We do not sell your personal data to third parties. We do not share identifiable health data with any third party.

Your Rights

You have the following rights regarding your data:

• Access: View all data stored about you within the app
• Deletion: Delete your account and all associated data
• Export: Export your session history
• Opt-out: Disable analytics and optional data sharing

To exercise these rights, use the Settings screen in the app or contact us directly.

Contact Us

If you have questions about this Privacy Policy or our data practices, please contact us:

Email: privacy@sisuapp.com