Privacy Policy
Clef is a free browser sight-reading trainer, with an iOS app in development. This page explains, in plain language, exactly what we collect when you use either one, why, and how to get it deleted.
Using the free web trainer collects nothing about you — your best-streak number lives only in your own browser's local storage and is never sent to us. If you join the iOS waitlist, we store the email address you type in and send it to Resend, our email-delivery processor, to send you a one-time confirmation and, later, a launch notice. We don't run analytics, don't use tracking cookies, and don't sell or share your data with advertisers.
What the web trainer collects: nothing that leaves your browser
The name-the-note drill at clefdrills.com needs no account and no sign-up. Your current session's score, streak, and accuracy exist only in memory while the page is open. The one thing that persists between visits — your best streak — is saved with the browser's localStorage API, on your device only. We have no server-side record of it, no way to see it, and no way to associate it with you.
What joining the iOS waitlist collects
If you type your email into the waitlist form and submit it, we collect:
- Your email address — so we can send you a one-time confirmation now, and a single notification when Clef for iOS opens for early access.
- Basic request metadata (IP address and timestamp) — used only to rate-limit abuse and filter automated spam submissions to the waitlist form. It is not used to identify or profile you.
That data is processed through Resend, the transactional email service we use to actually deliver the confirmation and launch-notice emails. Resend acts as our data processor for this single purpose; we don't hand your email to anyone else, and we don't use it for marketing beyond the launch notice you signed up for.
What we don't do
- No analytics or tracking scripts are installed on this site as of this writing (no Google Analytics, no ad pixels, no third-party trackers). If that changes — for privacy-friendly, non-invasive analytics — this policy will be updated first.
- No advertising cookies, no cross-site tracking, no selling or renting of email addresses to third parties.
- No account system for the web trainer, so there's no password, profile, or persistent identity to protect on our servers in the first place.
How long we keep it
Waitlist emails are kept until Clef for iOS launches and the waitlist notification has gone out, or until you ask us to delete it — whichever comes first. You can ask any time; see the contact section below.
Your rights: access, correction, deletion
Wherever you're writing in from, you can email support@clefdrills.com to ask what we have on file for your email address, correct it, or have it deleted outright. We aim to handle these requests within a few business days. Because the only personal data we hold is the email you volunteered for the waitlist, most requests are a single-step deletion.
Children's privacy
Clef is not directed at children under 13, and we don't knowingly collect personal information from anyone under that age. The web trainer itself needs no personal information to use at all — this only matters for the waitlist form. If you believe a child has submitted an email to the waitlist, contact us and we'll remove it.
Changes to this policy
If what we collect changes — for example, if we add privacy-friendly analytics or launch account features in the iOS app — we'll update the effective date at the top of this page and describe the change here before it takes effect.
Questions about your data
Email support@clefdrills.com any time — a person reads it, not a ticket queue. See also our Terms of Use and the Support page.
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