Privacy policy

What we collect

• Your account: your email address, your name if you give one, and your password, which we store only as a one-way hash, never as the password itself. We also note whether you’ve confirmed your email address. If you choose “Continue with Google”, Google tells us your email address, whether Google has confirmed it, and your name; we don’t get your Google password or contacts.
• Your studying: which chapters you’ve opened, your quiz, task test and daily quiz results, your written answers in quizzes and the practice oral, your review schedule and streak, and any question reports or notes you send us.
• Your checkride date, if you add one.
• Reviews you choose to submit: after moderation, they’re shown publicly on the site with the display name you pick.
• Billing: when you subscribe, we keep the customer and subscription IDs that Stripe gives us and the state of your subscription. Your card details go to Stripe and never reach our servers.
• Your time zone, in a cookie (see below), so your streak and daily quiz follow your own day.
• Your IP address, briefly, to limit repeated sign-in, sign-up and password-reset attempts and grades of the sample question on the home page. We hold it in memory for that and don’t save it to our database.

How we use it

• To run your account and your course: show your progress, schedule your reviews and build your daily quiz.
• To grade written answers. We send the question, its model answer and key points, and your answer to our AI provider, Anthropic. We don’t send your name or email address. Under our agreement with Anthropic, it isn’t used to train their models. Please don’t put personal information in your answers. Answers to the sample question on the home page are graded the same way and not stored.
• To email you about your account: confirming your address, password resets, email changes, a welcome note, a confirmation when you delete your account, and notices the Terms promise, such as a price change.
• To fix questions you report or grades you dispute: we read your answer and your note.

We don’t sell your data, run ads, or use analytics or advertising trackers.

Who else handles it

We share your information only with the companies that run parts of the service for us, or when the law requires it:

• Stripe handles payments and billing. It receives your email address at checkout and your payment details.
• Resend sends our emails. It receives your email address and the message.
• Anthropic grades written answers, as described above.
• Vercel hosts the website, and Neon hosts our database.

Cookies and browser storage

• Sign-in cookies. When you log in, our sign-in system (NextAuth) sets a session cookie that keeps you signed in for up to 30 days, plus small cookies that protect the log-in form. Logging out removes the session cookie.
• Time zone. A cookie named tz holds your browser’s time zone (for example, America/Phoenix) for up to a year.
• Browser storage. A few display preferences stay in your own browser, such as whether you’ve seen the welcome tour or collapsed the course sidebar. They aren’t sent to us.

There are no analytics, advertising or third-party tracking cookies. Stripe’s checkout and billing pages are on Stripe’s own site, under Stripe’s privacy policy.

How long we keep it

• We keep your account and study data for as long as your account exists.
• When you delete your account, your account, progress, answers and reports are deleted from our database straight away.
• Stripe keeps billing records, such as invoices and payments, under its own legal obligations. Deleting your Tailwind account doesn’t remove them.
• Password reset links expire after one hour.

Your choices

• Change your name, email address, password and checkride date on your Account page.
• Delete your account yourself under Account › “Delete your account”. You confirm with your password (or a recent Google sign-in); any subscription is cancelled immediately, and your account and progress are deleted.
• For a copy of your data, or anything else about your information, email us at support@tailwindstudy.com.

Children

You must be at least 13 years old to use Tailwind. We don’t knowingly collect information from children under 13. If you think a child under 13 has an account, email us and we’ll delete it.

Changes to this policy

If we change this policy, we’ll update the date at the top. If a change is significant, we’ll email you or post a notice in the app before it takes effect.

Contact

KCJV Industries LLC, support@tailwindstudy.com. See also the contact page and the Terms of Service.