Your Health Data Stays Private
CardioVista is built on a simple principle: your health data belongs to you. It never leaves your device.
Stored Locally
All health data stays on your device using Apple's SwiftData framework. Nothing is uploaded to external servers. Ever.
| Storage location | Technology | Encrypted |
|---|---|---|
| iPhone app data | Apple SwiftData | Yes |
| Apple Watch data | WatchKit UserDefaults | Yes |
| Widget display data | App Group UserDefaults | Yes |
| Profile photo | Local Documents folder | Yes (encrypted at rest) |
| Apple Health data | Apple Health store | Yes |
No Network Required
CardioVista works completely offline. No internet connection needed. No accounts, no login, no cloud sync. Your private heart health app doesn't need the internet because your data has nowhere else to go.
See all the features that work completely offline — explore CardioVista features →
No Third-Party Tracking
Zero analytics, zero advertising SDKs, zero crash reporters. No third-party code touches your data. CardioVista is built entirely on Apple frameworks — no external dependencies that could compromise your health data on device.
- No advertising networks
- No analytics or crash reporting SDKs
- No tracking pixels or fingerprinting
- Zero data collection — the strongest privacy guarantee is architectural
Encrypted Storage
Your data is protected by iOS device encryption and Secure Enclave. Only you can access it. When your device is locked, iOS Data Protection ensures app data is encrypted and inaccessible.
Apple Health Integration
Health data syncs only through Apple Health with your explicit permission. CardioVista reads but never modifies your Health data (except body measurements you choose to write back).
- Permission is per data type — grant or deny each separately
- Revoke access anytime in Settings without deleting the app
- Data never leaves the local Apple Health store on your device
Data Export & Deletion
Export all your data anytime. Delete everything with one tap. You have full ownership and control.
Export All Data
Choose CSV (machine-readable) or PDF (human-readable report) and share the file to any destination.
Delete All Data
Permanently erase all records from your device. Alternatively, uninstalling CardioVista removes everything.
On-Device AI Analysis
Our AI health analysis runs entirely on your device using Apple Foundation Models. Your health data is never sent to any server — not to OpenAI, not to Google, not to anyone.
- All analysis happens locally on your iPhone's Neural Engine
- AI output is clearly labeled and includes a medical disclaimer
- On older devices, the app falls back to static trend summaries
Website Analytics
This website uses cookie-free analytics tools (Cloudflare Web Analytics and Simple Analytics) that collect no personal data, use no cookies, and do not track you across websites. We see how many people visit our pages — not who they are.
You may optionally enable enhanced analytics (heatmaps, error tracking, performance monitoring) which use session cookies. These tools are only loaded if you explicitly opt in. You can change your preferences at any time using the "Analytics Preferences" link in the footer.
We do not sell, share, or transfer your data to any third party for advertising purposes. Ever.
Always Active (Cookie-Free)
- Cloudflare Web Analytics
- Simple Analytics
Opt-In Only (With Consent)
- Microsoft Clarity (heatmaps)
- Sentry (error tracking)
- New Relic (performance)
Full Privacy Policy
Last updated: March 26, 2026
The Short Version
CardioVista does not collect, transmit, sell, or share any of your personal data. Everything you enter and every health metric the app reads stays on your device. There are no accounts, no servers, no analytics, and no third-party SDKs.
1. Who We Are
CardioVista is an independent app developed for people managing cardiac conditions. The app is published by Icaro Nunes through Apple's App Store.
CardioVista is not a medical device and is not a covered entity under HIPAA. It is a personal wellness tracking tool. No clinical data is processed on our behalf because we receive no data from you at all.
2. What Data CardioVista Uses
CardioVista stores and uses only data that you explicitly provide or authorize.
Data You Enter Manually
- Health check-ins — daily well-being ratings, energy levels, breathlessness scores
- Symptoms — type, severity, duration, free-text notes
- Medications — names, doses, schedules, adherence logs, side effect notes
- Supplements — names, doses, adherence
- Vital signs — blood pressure readings (manual entry)
- Body measurements — weight, waist circumference, body composition
- Fluid intake — daily fluid entries and limits
- Journal entries — free-text personal notes
- Health profile — cardiac condition, care team contacts, emergency contact, implanted device info
- Caregiver contacts — names and phone/email for designated alert recipients
- Profile photo — optional, stored locally only
Data Read from Apple Health (with your permission)
- Heart rate and resting heart rate
- Heart rate variability (HRV)
- Blood oxygen saturation (SpO2)
- Respiratory rate
- Steps and active energy
- Sleep analysis
- Body weight (read and write) and body fat percentage
- Waist circumference
- Workouts and GPS routes (if you choose to import them)
Each Apple Health data type requires separate, explicit authorization. You can revoke access at any time without deleting the app.
3. Where Your Data Lives
All data is stored exclusively on your device.
We operate no servers. There is no CardioVista backend, no cloud database, and no remote API that your data is sent to.
4. What CardioVista Does NOT Do
- Collect data on a server — Never
- Sell or share your data — Never
- Use advertising networks — Never
- Use analytics or crash reporting SDKs — Never
- Sync data to iCloud or CloudKit — Never
- Require an account or login — Never
- Use third-party SDKs or frameworks — Never
- Include advertising — Never
- Use tracking pixels or fingerprinting — Never
CardioVista is built on zero external dependencies — pure Apple frameworks only.
5. Apple Health Integration
- Permission is per data type. The app requests authorization separately for each health data type.
- You can revoke access at any time. Go to Settings → Health → Data Access & Devices → CardioVista.
- Data never leaves the local store. CardioVista reads data from your device and displays it within the app.
- We only write back what you enter. Weight and body measurements can be written to Apple Health with your consent.
- Unused access is not requested. Only the data types actually displayed are requested.
6. Notifications
All notifications are generated and scheduled entirely on your device using iOS's local notification system. No notification content is routed through a server.
Medication reminder notifications use generic body text and do not include drug names or doses on the lock screen.
7. Caregiver Alerts
When an alert condition is met, the app opens your device's native Messages or Mail app with a pre-composed message. You review and send the message yourself — CardioVista does not send messages automatically.
Important: SMS and standard email are not end-to-end encrypted. We recommend only adding caregivers you fully trust and reviewing the message content before sending.
8. On-Device AI Analysis
CardioVista offers AI-generated health insights using Apple Foundation Models, which run entirely on-device on iPhone 16 and later (iOS 18.1+).
- No data leaves your device for AI processing
- No connection to external AI services
- On older devices, AI analysis is not available — the app falls back to static trend summaries
- AI output is clearly labeled as AI-generated and not medical advice
9. Widget and Apple Watch Data
A small amount of data is written to a shared App Group storage area for Home Screen widgets and Apple Watch complications. This data is stored only on your device, refreshed regularly, and stale data older than 2 hours is treated as unavailable.
10. iCloud Backup
CardioVista does not use iCloud or CloudKit for data sync or storage. If you have iCloud Backup enabled, your device's encrypted backup may include app data as part of standard iOS backup — controlled entirely by your iOS settings.
11. Your Rights — Data Export and Deletion
Right to Access
All your data is visible within the app at all times. There is no hidden or background data collection.
Right to Export
Export all your data at any time: open CardioVista → Profile → Settings → Privacy & Data → Export All Data. Choose CSV or PDF.
Right to Delete
Permanently delete all data: open CardioVista → Profile → Settings → Privacy & Data → Delete All Data. Alternatively, uninstalling removes all data.
GDPR Rights (EU/EEA Users)
Because CardioVista processes no personal data on external servers, most GDPR obligations that apply to data controllers do not apply. Your data is processed solely on your own device under your own control.
CCPA Rights (California Users)
We do not sell data. The right to opt out is automatically satisfied. We do not differentiate service based on privacy choices.
12. Children's Privacy
CardioVista is not directed at or intended for use by children under 17. It is designed for adults managing cardiac health conditions.
13. Legal Compliance
CardioVista complies with Apple's App Store Review Guidelines for health apps. It is not a HIPAA covered entity. No personal data is transferred to any country — all data remains on the user's device.
14. Data Retention
CardioVista retains data for as long as you keep it in the app. There is no server-side retention. When you delete the app, iOS removes all locally stored data including the App Group container.
15. Changes to This Policy
If we make material changes, we will post the updated policy with a new date and notify users via an in-app notice. We review this policy at least once per year.
16. Contact
If you have questions about this privacy policy, please contact us at support@cardiovista.app. We aim to respond within 30 days.
Summary
CardioVista was built with a single privacy principle: your health data belongs to you, stays with you, and goes nowhere else. No accounts. No servers. No tracking. No exceptions.
The strongest privacy guarantee we can make is architectural — there is no infrastructure to leak your data, because we built none.
CardioVista is not a medical device and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.
Terms of Service
Last updated: March 26, 2026
The Short Version
CardioVista is a personal health tracking tool. Use it for your own wellness tracking, not as a substitute for medical care. You own your data. We can't access it.
1. Acceptance of Terms
By downloading, installing, or using CardioVista, you agree to these Terms of Service. If you do not agree, please do not use the app. These terms apply to all users of CardioVista for iPhone and Apple Watch.
2. Permitted Use
CardioVista is designed for personal, non-commercial use. You may use it to track your own cardiac health, medications, symptoms, and wellness data. You may share your health reports with your care team at your discretion.
You agree not to reverse-engineer, decompile, or otherwise attempt to extract the source code of the app, except where permitted by applicable law.
3. Not Medical Advice
CardioVista is not a medical device. It does not provide medical advice, and nothing in the app should be interpreted as a substitute for professional medical guidance. The app is a personal wellness tool designed to help you track and understand your health data.
Always consult a qualified healthcare provider before making changes to your medications, treatment plan, or health routines. If you are experiencing a medical emergency, call your local emergency services immediately.
4. Your Data
You own all the data you enter into CardioVista. All data is stored locally on your device — we have no access to it. We cannot retrieve, view, or recover your data under any circumstances.
For full details about how your data is handled, please read our Privacy Policy above.
5. Limitation of Liability
CardioVista is provided "as is" without warranties of any kind. To the fullest extent permitted by law, we disclaim all liability for any damages arising from your use of the app, including but not limited to data loss, missed medication reminders, or reliance on app-generated health summaries.
Because all data is stored locally on your device, we are not responsible for data loss due to device damage, theft, or software issues. We recommend using your device's built-in backup features to protect your data.
6. Changes to These Terms
We may update these Terms of Service from time to time. When we make material changes, we will update the "Last updated" date and notify you via an in-app notice. Continued use of CardioVista after changes are posted constitutes acceptance of the revised terms.
7. Contact
If you have questions about these terms, please contact us at support@cardiovista.app.
CardioVista is not a medical device and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.