Privacy Policy
Effective date: 2026-05-28
Last updated: 2026-06-12
Senary Design ("we", "us") operates the Senary Design app and the senary.design website. We are the controller of the personal data described below. For any privacy question or request, contact us at base@senary.design.
Data we collect
Account. Your email address, and either a password (stored only as a hash) or your Sign in with Apple identifier. We use this to authenticate you, recover your account, and send transactional email such as receipts and password resets.
Birth data. Your date, time, and place of birth, which you enter during onboarding. This is used to compute your Human Design chart. In the iOS app, your chart is calculated entirely on your device. On the senary.design website, your chart is calculated on our dedicated server, which processes your birth data only for that purpose.
Health and fitness data. With your permission, we read data from Apple Health, which may include heart rate, resting heart rate, heart rate variability, sleep, steps, active energy, respiratory rate, mindful minutes, and workout type and duration. We never write to Apple Health. This data is processed on your device to relate your body's rhythms to your chart and to the daily transits.
Photo location. If you grant Photo Library access, we read only the date and location of your photos to build a travel timeline. We never load or display the images themselves.
Journal. Notes you write in the app are stored on your device and synced to our server so they survive reinstalls and are available across your devices.
Server logs. When you use the app or website, our server records standard access information such as IP address, time, and request path, retained for up to 30 days for security.
Payments. Web subscriptions are processed by Stripe. We never see your full card number — only the last four digits, card brand, country, and a customer reference.
Sharing your data with us
In the iOS app, your Health, birth, and photo-location data stay on your device by default. In Settings → Data there is a sharing toggle, off by default. When you turn it on, anonymized records derived from this data are sent to our server to improve the app. We never sell your data, and we never share Health data with advertisers or data brokers. You can turn the toggle off at any time.
Who processes data on our behalf
We rely on third-party service providers to operate the app — including providers that host our servers, send account email, and process web payments, as well as Apple for sign-in and the App Store. These providers act on our behalf under agreements that require them to protect your data and use it only to provide their service to us. We do not share your data with anyone for their own purposes, and we do not sell it.
Retention and deletion
We keep your account and synced data until you delete them. You can delete your account and all associated server data at any time from Settings → Account → Delete account, or by emailing us. Local data is removed immediately; server-side data is removed within 30 days. Billing records are kept as long as tax law requires.
Your rights
You can access, correct, export, or delete your data, and withdraw any permission you have granted. Withdraw Apple Health access in iOS Settings → Privacy & Security → Health; withdraw Photos access in iOS Settings → Privacy & Security → Photos; turn off data sharing in Settings → Data. To make any other request, email base@senary.design from the address tied to your account. Depending on where you live, you may also have the right to complain to your local data protection authority.
Children
The app is not directed to children. You must be at least 16 to create an account. If you believe a child has provided us data, contact base@senary.design and we will delete it.
Security
Traffic between the app and our server is encrypted with TLS. Passwords are hashed. We restrict access to our systems and encrypt backups. No system is completely secure, but we work to protect your data and will notify you of any incident that affects it.
Changes
If we materially change how we use your data, we will update this page and the date above, and notify you in the app.