8DAPT App Privacy Policy
How the 8DAPT app handles your heart data, your session records and anything you choose to share from Apple Health.
Last updated November 2, 2026
8DAPT is an elite health and performance training app provided by Lagos Enterprises Inc (“we,” “us”), the practice of Dr. Leah Lagos, 505 Park Avenue, Suite 1904, New York, NY 10022. We decide how 8DAPT data is used and we are responsible for it. This policy covers the 8DAPT app on iPhone, Apple Watch and the web. The website privacy policy covers drleahlagos.com.
8DAPT supports training. It is not a medical device, and it does not diagnose, treat or monitor any medical condition. Accounts are by invitation only.
Information we collect
Information you give us:
- Account: your email address and name, used to sign in and to identify your records.
- What you enter: goals, notes on how a session felt, answers to short check-in questions and assessments, ratings and optional tags.
- Safety reports: if you tap that you feel light-headed or unwell during a session, the time, the type of session and what you reported, so Dr. Lagos can follow up with you.
- Support: feedback you send from the app, with an optional screenshot, your device model and app version, and any data deletion request.
Heart data from your sessions:
- Chest strap (Polar H10 or Amazfit Helio): heart rate and beat-to-beat (RR) intervals, read over Bluetooth while the strap is connected to the app. The app calculates heart rate variability (HRV) from these intervals.
- Phone camera (optional, when no strap is connected): pulse beats read from your fingertip with the rear camera and light. Nothing is recorded or saved as a photo or video.
- Session records: the date, length and type of each breathing or training session, and the summary values calculated from it.
- Monitoring days (only when you start one): heart rate and beat-to-beat intervals recorded by the strap through a monitoring day of up to 12 hours, uploaded to your account in parts, with strap battery and connection-gap logs so gaps are not mistaken for data.
- Apple Watch (optional): heart rate during a paced session on the watch.
Apple Health (optional, only if you allow it). With your permission, 8DAPT reads these Apple Health data types:
| Apple Health data type | Access | Why |
|---|---|---|
| Heart Rate Variability (SDNN) | Read | Your HRV trend, including days you did not open the app |
| Resting Heart Rate | Read | Your resting heart rate trend |
| Sleep Analysis | Read | Sleep context for your trends |
| Steps (Step Count) | Read | Daily step totals |
| Workouts | Read | Training load context |
| Cycle days (Menstrual Flow) | Read | Cycle context for your trends |
| Mindful Sessions | Read and write | Each breathing session you finish is saved to Apple Health as a mindful session |
| Heart Rate (Apple Watch app) | Read | Heart rate during a paced session on the watch |
| Workout (Apple Watch app) | Write | The watch session is saved to Apple Health as a workout |
You choose which types to allow in the Apple Health permission screen and can change this at any time in the Health app or iPhone Settings. 8DAPT saves daily values from these types to your account so your trends stay complete.
Optional features, only if you turn them on:
- Location: off by default. When on, your location is rounded to about 1 kilometer and saved with the session, and used to add local weather and a place name.
- Chat-export import: message text is read on your phone and never leaves it. Only daily message counts per sender name are saved, and only you and Dr. Lagos can see them.
- Ask 8DAPT, where offered: your question and your own records are sent to an AI service through Viktor to write the answer. Answers are labelled as AI and are based on your record only.
- Voice notes, where offered: the audio is sent for transcription and is not stored; the text is saved as your note.
Collected automatically:
- App activity: which screens and features you use (no health values), used to improve the app.
- Diagnostics: crash reports with your account ID, device and app version; error messages stored without your account ID; strap disconnect events.
8DAPT does not use an advertising ID, advertising networks or third-party analytics tools.
How we use it
- To run your sessions and show you your own results and trends.
- So Dr. Lagos can review your training and guide your program.
- To provide support, fix problems and improve the app.
- For research, only if you give separate research consent. Research results use de-identified group data, never one person’s records.
- To meet legal obligations.
Apple Health data
Data from Apple Health is used only to show you your own trends and to support your training with Dr. Lagos. It is never used for advertising or marketing, never sold, never shared with data brokers, and never stored in iCloud.
Who can see your data
- You and Dr. Lagos. Access is logged.
- Viktor, the system that runs the app for Dr. Lagos, also has access, under her instruction.
- Summaries without your name may be kept in Dr. Lagos’s private practice records.
- No employer, organization or program sponsor sees your individual data.
How we share it
We do not sell your data, we do not show ads, and we do not share your data with third parties for their own use. We share it only with service providers that process it on our behalf and only to provide 8DAPT:
| Service provider | What it receives | Purpose |
|---|---|---|
| Convex | Your account and app records | Database hosting |
| Viktor | Sign-in details and app records | App hosting, sign-in, account emails and AI answers (Ask 8DAPT, where offered) |
| Open-Meteo | Rounded location or city and date (only if location is on) | Local weather for session context |
| BigDataCloud | Rounded location (only if location is on) | Place name label |
| ElevenLabs | Voice note audio, where offered | Speech to text and spoken session cues |
| HeyGen | Scripts you write, where offered | Video cues |
We may also disclose information when required by law or to protect the rights and safety of you, the practice or others.
Where it is stored
Your 8DAPT account and records are stored with Convex in the United States and sent over encrypted connections (HTTPS). Data the app keeps on your phone is encrypted with a key held in the iOS Keychain. An optional Face ID lock is available; your face data never reaches 8DAPT.
Retention
We keep your 8DAPT records while your account is open, so your trends stay complete. When you delete your account in the app or ask us to delete it, your account and your records are deleted within 30 days, except records the law requires us to keep. If you joined a research study, the consent records and the study data you agreed to share are kept as your signed consent form describes.
Deleting your data
You can delete your account and all your recorded data at any time, in either of two ways:
- In the app: Settings, Delete account and data. This deletes your account and your recorded data: sessions, heart data, check-ins, notes and assessments.
- By email to drlagos@drleahlagos.com with the subject “8DAPT data deletion request”, from the email address on your account.
For email requests we reply within 5 business days and confirm by email when deletion is complete. Data already saved to Apple Health stays in Apple Health under your control; you can delete it in the Health app. You can also ask to see or correct your data at the same address.
Changes to this policy
We may update this policy. The date above shows when it last changed.
Contact
Lagos Enterprises Inc
505 Park Avenue, Suite 1904, New York, NY 10022
drlagos@drleahlagos.com · 917-261-7464