Privacy
Effective 12 October 2026
Who we are
Pillars is made by Eric Liu, in the United States. If you have a question about your data, or want it deleted, write to privacy@bazipillars.app.
The short version
Pillars saves your chart, the people you add and the questions you ask to your account on our server, so nothing is lost when you change phones. You can delete all of it from the app.
What we collect
You create an account with your email before your first reading. Until then, what you enter stays on your phone. Then we save it to your account: your first name, birth date, birth time and birthplace, your sex at birth, and the topics you picked. The same goes for each person you add, with who they are to you. When you ask a question, we save it with its answer and the chart facts the answer came from. We save your email too. The app also gives each phone its own identifier, so your account knows which phones are yours. It changes if you reinstall.
What we don't collect
Your address book, your location, your photos or an advertising identifier. There's no third-party analytics, no ad tracking and no crash reporting. The morning line is scheduled on your phone. We don't send push notifications.
What it's for
Working out your chart and theirs, writing your day and your readings, answering your questions, and bringing it all back when you sign in on a new phone. We also read questions ourselves, to see where the answers fall short and make them better. Nothing else.
People you add
Their details are saved to your account, like yours. Nobody else using Pillars can see them. We never contact the people you add, and they can't see that you added them. If someone added you and you'd like your details removed, write to privacy@bazipillars.app.
Ask
To answer, we send your question and the chart facts it needs to Anthropic, whose AI model writes the answer. It gets the question as you typed it, and facts such as your element and the day's. Not your name, and no birth details. We keep your questions and answers so you can look back at them, and we don't use them to train any model of our own.
Signing in
You need an account to use the app, and you can sign in with it on any phone. We send a 6-digit code to your email. We keep a scrambled copy of the code, never the code itself, and it stops working after 10 minutes. We only use your email to sign you in or to send your invite, never for marketing.
Where it's kept
Our server runs on Vercel, and your data is stored with Supabase in the us-east-1 region. Nobody else using Pillars can see it. Your phone keeps a copy too, so Pillars works offline. We share data only with Vercel, Supabase, Anthropic and Resend, which sends our emails, and only what each needs. Each protects it at least as well as this policy does.
Deleting it
Swipe a question left to delete it. Remove a person, and their details are deleted from our server too. To delete everything, open Settings and tap Delete all my data. Your account, your chart, your people and your questions go from your phone right away, and from our server, backups included, within 30 days. Signing out, or deleting the app, clears your phone but keeps your account, ready for when you sign back in.
A copy of your data
Write to privacy@bazipillars.app and we'll send you everything we hold about you.
Invites
Pillars is invite only for now, and each member can invite two people by email. When you invite a friend, we collect the email address you give us for them, to send the invite. If someone invites you, we send you one email in their name, with a link to Pillars on the App Store. We keep your email only to let you in when you sign up. If you don't sign up within 30 days, or you stop the emails, we delete it. The person who invited you sees whether you joined, and nothing else. Deleting your account deletes the invites you sent.
The waitlist
If you join the waitlist, on our website or in the app, we keep your email address so we can send you an invite. Nothing else. To come off it, write to privacy@bazipillars.app. We delete it a year after the invites have gone out.
Birthplace lookup
The iOS app resolves your birth city from a list bundled inside the app, so the lookup itself never leaves your phone. The website may send the city name you type to a geocoding service to find its coordinates; it never sends your birth date or time.
Share links
Pillars does not make links to your chart. If someone sends you a match invite, its page shows a name, an element and the match, never a birthday.
Children
Pillars is not directed at children under 13 and does not knowingly collect information from them.
Changes
If this policy changes, the date below will change with it.
Contact
Questions: privacy@bazipillars.app