The fastest way to get help is to email [email protected]. We read every message and respond within two business days.

Common issues

Before you email, here are the most common things students hit.

• Sign-in won't work. Make sure your browser allows third-party cookies for accounts.google.com, and that you're signed in to the Google account you want to use. If you've recently changed your Google password, sign out and back in.
• My progress disappeared. Your data lives on our servers, not on your device. If you're signed in to the same Google account, your history should be there. If it isn't, email us with the email address you used and we'll investigate.
• A question seems wrong. Use the flag chip on the reveal screen to mark it. We review flagged items in batches.
• I can't install on my phone. Open the site in Chrome (Android) or Safari (iOS), then choose "Add to home screen." That's it. No app store required.

Request data deletion

You can delete your account and all the data we hold about you at any time. Here's how it works.

• Email [email protected] from the address you used to sign in. The subject line "Delete my account" makes it move faster.
• We confirm receipt within two business days and ask one question to verify it's really you (usually the last test you took on the platform).
• We delete your account and all associated attempt history within seven days of verifying. You'll get a confirmation email when it's done.
• After deletion, your data cannot be restored. If you sign in again later with the same Google account, you'll start with a clean slate.

We may retain aggregated, de-identified analytics that cannot be traced back to you. We may also retain records required for legal compliance (rare).

Request a copy of your data

You can ask us for a portable copy of everything we hold about you. Email [email protected] with the subject "Export my data." We'll deliver a JSON file containing your account, your test target, and your full attempt history within fourteen days of the request.

Report a security issue

If you find a security vulnerability, please email [email protected] with the subject "Security disclosure." Include steps to reproduce. We'll acknowledge within two business days and work with you on a fix. We do not yet run a paid bug bounty, but we will publicly credit researchers who report responsibly.

Privacy questions

For questions about how we handle your data, see our privacy policy. For specific requests covered there (access, correction, portability, deletion, objection), email [email protected].

Press, partnerships, anything else

Same address: [email protected]. Mention what you're after in the subject line and we'll route it to the right person.