Privacy policy

Last updated October 19, 2026

This is a draft while Zenkai is in development. It will be reviewed by a lawyer before launch.

This policy explains what Zenkai (“we”) collects when you use the Zenkai app and website, why, and what you can do about it. The short version: Zenkai never holds your money or your keys, we collect as little as we can, and we don't sell personal data.

What we collect

• Your wallet address. When you connect a wallet or sign in, we use its public address to show your balances, history and rewards.
• Your email, if you sign in with email or Google. Sign-in is run by Privy, which creates a wallet that only you control. Privy handles your login; we receive your wallet address and may receive your email. If you use Google, Google tells Privy your email and name to confirm it's you.
• Waitlist emails. If you join the waitlist, we keep your email to tell you when the apps launch, and the invite code that brought you, if any.
• Rewards. If you turn on rewards, we keep your aura points, your invite code, who invited you, the transactions you made in Zenkai that earned points or cash rewards, the cash rewards you've earned, and each time you collect them: the amount, the asset you chose and the transaction.
• Your public transaction history. To draw your chart, we read your wallet's transactions from the Solana blockchain and store a summary of how your balances changed.
• Notification address, if you turn on notifications. Your browser gives us an address its push service uses to deliver notifications to your device, and we keep it with your wallet address so we can tell you when your monthly report is ready. Turning notifications off deletes it.
• Basic technical data. Our hosting provider records standard server logs, such as IP address and browser type, to keep the service running and secure.

What we don't collect

• Your private keys or recovery phrase. We can't see them and can't move your money.
• Your card or bank details. When you add money, the provider (Coinbase, or the provider chosen in Privy) collects them under its own privacy policy.
• Advertising or analytics trackers. Zenkai doesn't use any.

Cookies and storage on your device

• Session cookie (zk_session): keeps you signed in to rewards for up to 30 days.
• Invite cookie (zk_ref): remembers which invite link brought you, for 30 days.
• Preview cookie (zk_demo): remembers that you entered the preview password, for 30 days.
• Local storage: your light or dark choice, currency, the sample portfolio, goals, recurring buys in the sample, lesson progress, your choice of lender, and your notification inbox. These stay in your browser.

Who we share data with

We share only what each service needs to do its job:

• Privy, for sign-in and wallets, and Google if you sign in with Google.
• Coinbase, or the provider chosen in Privy, when you add money with a card or bank.
• Jupiter, when you trade or collect rewards as an asset other than dollars: your wallet address and the trade.
• Kamino or Jupiter Lend, when you use the Dollar or Euro Capsule: your wallet address and the deposit or withdrawal.
• Your browser's push service (such as Google's or Apple's), to deliver notifications if you turn them on.
• Our Solana network provider, to read balances and send transactions.
• Our hosting and database providers, which store data on our behalf.

We may also share information if the law requires it, or to protect people from fraud or harm.

The blockchain is public

Transactions on Solana are public and permanent. Anyone can see a wallet's balances and history, and neither we nor anyone else can delete them.

How long we keep it

We keep account and rewards data while you use Zenkai, and waitlist emails until launch or until you ask us to remove them. When you ask us to delete your data, we do, except what we must keep for legal reasons or to prevent fraud.

Your choices

You can ask to see, correct or delete the data we hold about you. Depending on where you live, you may have other rights too, such as under the GDPR or California law. Write to us at the contact address listed here before launch and we'll reply within 30 days.

Age

Zenkai is for people 18 and older. We don't knowingly collect data from anyone younger.

Changes

If we change this policy, we'll update the date at the top, and tell you in the app if the change is significant.

Contact

Questions about privacy: the contact address listed here before launch.