1. What this policy covers
This policy explains exactly how tendwell uses health data: data it reads from Apple Health or Health Connect, and health information you or your family add yourselves. It is part of our privacy policy and is binding on Nousattva Pty Ltd.
"Health data" here means any information about a person's body, health, fitness, sleep, cycle, medicines or care.
2. Our rules for health data
- Only with your permission. tendwell reads nothing until you allow each data type, and you can switch any of them off later.
- Only for your features. Health data is used to give you and the people you choose the features of tendwell, and for nothing else.
- Never sold, never for ads. Health data is never sold, rented or used for advertising, marketing or audience building.
- On your phone first. Insights are calculated by the app on your phone.
- Encrypted twice. What is stored on our servers is encrypted in transit and at rest, and encrypted again by tendwell with separate keys.
- Shared only by you. Followers, family and challenge members see only what you choose to share.
- Deleted when you ask. Delete any entry, or your whole account, at any time.
3. What we read and why
| Data | What it's used for |
|---|---|
| Sleep (time asleep, stages, bedtime) | Readiness, sleep insights, sleep posts you choose to share, bedtime challenges |
| Steps, distance, active energy | Daily activity, step and distance challenges, trend tiles |
| Heart rate, resting heart rate, heart rate variability | Readiness, "getting sick" signal, effort score for challenges, trends |
| Workouts and routes | Workout history, effort score, workout posts and route maps you choose to share |
| Cardio fitness (VO2 max) | Fitness trend |
| Blood oxygen, respiratory rate | Breathing at night signal |
| Blood glucose | Glucose trend card |
| Body measurements (such as weight, height) | Trends, and estimating effort where it needs them |
| Cycle tracking | Period, ovulation and fertile window predictions |
| Date of birth or age | Estimating maximum heart rate for effort scores, age checks |
We only ask for the types needed for features you use. If you don't allow a type, the features that need it won't work, and everything else will.
What you add yourself
Medicines, doses and reminders, doctor visits, symptoms, temperatures, notes and family health logs are used to show your records, send reminders, make summaries for your doctor and, if you choose, alert family members.
4. Apple Health and Health Connect
Data from Apple HealthKit (Apple Health) and Android Health Connect gets extra protection, as both platforms require:
- It is used only to provide or improve tendwell's health and fitness features that you can see and use.
- It is never used for advertising, marketing or data mining, and never sold.
- It is never shared with third parties except the people you choose to share it with, and service providers who store and process it only for us, under contract.
- It is never used to decide anyone's eligibility for credit, insurance, employment or housing.
- Apple Health data is never stored in iCloud.
- tendwell writes data back to Apple Health or Health Connect only where a feature says so, and only with your permission.
tendwell's use and transfer of information received from Health Connect follows the Health Connect Permissions policy, including the Limited Use requirements. Our use of HealthKit data follows Apple's App Store Review Guidelines.
6. Cycle and fertility data
- Cycle data is never shown to followers or in challenges.
- It's shared with a family member only if you specifically choose it for that person.
- It is never used for ads or audiences, even if you later opt in to personalised ads.
- We won't hand it over to anyone unless the law requires it, and we'll challenge requests that are too broad.
- You can delete your cycle history at any time without deleting your account.
7. Coach and automated insights
Insights, signals and Coach answers are produced by tendwell's own software. We do not send your health data to outside artificial intelligence providers. If we ever want to, we'll explain what would be sent and ask your permission first, and you can say no without losing other features.
Automated insights can be wrong. They are not a diagnosis. Please read section 2 of our terms of service.
8. Product analytics
To understand which parts of tendwell work well, we may ask your permission to collect anonymous usage events. If you agree:
- Events record screens and actions only, such as "opened Today" or "joined a challenge".
- They never contain health readings, medicine names, cycle data or the text of posts.
- They're linked to a random ID that the analytics provider can't connect to your account.
- You can switch analytics off in Settings at any time.
9. Research and aggregated data
We don't use your health data for research or share it with researchers. If we ever offer a research programme, it will be separate, opt-in, explained in full before you join, and approved by an ethics committee where required.
We may count things across all users, such as how many people joined a challenge, as long as no one can be identified from the result.
10. Your control
- Change what tendwell reads: iPhone Settings › Health › Data Access and Devices › tendwell, or the Health Connect app › App permissions › tendwell.
- Change what others see: sharing settings for each family member, and privacy settings for your account and each post.
- Delete data: any record in the app, or your whole account. Deleting in tendwell doesn't remove data from Apple Health or Health Connect.
- Get a copy: email it.dev@nousattva.com.
11. Questions
If anything here isn't clear, or you think we've fallen short of it, email it.dev@nousattva.com. We'll reply within 30 days.