Privacy Policy · 隱私權政策

iKima ("we", "our", or "the app") is a breathing and heart rate wellness app for Apple Watch and iPhone. We are committed to protecting your privacy. This policy explains what data we collect, how we use it, and your rights.

1. Data We Collect

iKima collects only the minimum data necessary to provide its features:

• Health data — heart rate, heart rate variability (HRV), and resting heart rate, read from Apple HealthKit with your explicit permission.
• Session data — breathing session records (pattern, duration, cycles, mood check-ins) stored locally on your device using SwiftData.
• App preferences — settings such as weekly session goals, reminder times, and language preference, stored locally via UserDefaults.
• Anonymous usage events — see Section 4 below.

2. Data We Do NOT Collect

• We do not collect your name, email address, or any account information.
• We do not transmit health or session data to any external server.
• We do not collect device advertising identifiers (IDFA/IDFV) or precise location.
• We do not use advertising SDKs or social media SDKs.
• We do not sell or share your data with third parties.

3. HealthKit

Health data accessed through Apple HealthKit is used solely to display real-time heart rate during sessions and to show personal wellness trends within the app. This data is never transmitted outside your device. We do not request access to Health Records or any HealthKit categories beyond heart rate, HRV, and resting heart rate. The app does not write any data back to HealthKit.

4. Anonymous Analytics

To understand how the app is used and to improve future versions, iKima collects anonymous usage events. These events contain no personally identifiable information.

Examples of events collected:

• App launched, session started, session completed or abandoned
• Which breathing pattern was selected and for how long
• Whether HealthKit permission was granted or skipped
• Device platform (iPhone or Apple Watch), iOS/watchOS version, device model
• Hour of day and day of week (no exact timestamp)

Events are never linked to you as an individual. No name, email, Apple ID, location, health data, or device identifier is included.

Events are buffered locally and sent in batches to Mixpanel, a third-party analytics service hosted in the United States. Mixpanel's privacy policy is available at mixpanel.com/legal/privacy-policy. Only anonymous, non-identifiable event data is transmitted — no health data, no personal identifiers.

5. How We Use Your Data

Data Type	How Collected	Purpose	Shared With
Heart Rate & HRV	Apple HealthKit (read-only, with permission)	Display live HR during sessions; show before/after comparison in results	Nobody — stays on device
Session Records	Generated by app activity, stored locally via SwiftData	Display history, statistics, streak, favourite pattern	Nobody — stays on device
Mood Check-ins	User input (emoji selection before/after session)	Show mood trend in results screen	Nobody — stays on device
App Preferences	User settings, stored locally via UserDefaults	Personalise reminders, goals, language	Nobody — stays on device
Anonymous Usage Events	Automatically generated (no health data, no identifiers)	Understand app usage patterns; improve future versions	Mixpanel (anonymous only — see §4)

6. On-Device Insight

Session feedback (heart rate delta and HRV chip) is computed entirely on your device. No data is sent to any AI or cloud API to generate this feedback. The app works fully offline.

7. Data Storage & Security

• Personal data (health, sessions, preferences) — stored locally on your Apple Watch and iPhone only. iCloud sync, if enabled by you, is governed by Apple's iCloud Privacy Policy.
• Anonymous analytics — transmitted over HTTPS (TLS 1.2+) and stored with AES-256 encryption at rest. Insert-only access enforced; no client can read stored events.

8. Your Rights — Opt-Out & Data Deletion

You have full control over your data:

• Revoke HealthKit access — Go to iPhone → Settings → Health → Data Access & Devices → iKima → turn off Heart Rate. The app continues to work without biometric data.
• Delete session records — Delete the iKima app from your iPhone and Apple Watch. All local session data (SwiftData) and preferences (UserDefaults) are permanently deleted.
• Opt out of anonymous analytics — Email us at ikima@sentiralabs.app with subject "Analytics Opt-Out" and your anonymous device ID (found in Settings → About). We will delete any events associated with that ID from Mixpanel within 30 days. Note: because events contain no personal identifiers, we cannot guarantee complete association, but we will make best efforts.
• Request data deletion — Email ikima@sentiralabs.app. Since no personal data is stored on our servers, deletion primarily applies to anonymous analytics events as described above.

9. Third-Party Services

iKima uses the following third-party service:

• Mixpanel (analytics) — receives only anonymous, non-identifiable usage events. No health data. No personal identifiers. Mixpanel is committed to the same level of data protection described in this policy. See Mixpanel Privacy Policy.

10. Children's Privacy

iKima is not directed at children under 13. We do not knowingly collect data from children.

11. Changes to This Policy

We may update this policy from time to time. The updated date at the top of this page will reflect any changes. Continued use of the app constitutes acceptance of the revised policy.

12. Contact

If you have questions about this privacy policy, please contact us at: ikima@sentiralabs.app