Terms of Use

1. Acceptance of these terms

By installing or using Clef for iOS, or by using the free drill at clefdrills.com, you agree to these Terms of Use. If you don't agree, please don't use the service. If you're using Clef on behalf of a school, studio, or organization, you're confirming you have the authority to accept these terms for that organization. For the iOS app, Apple's standard Licensed Application End User License Agreement (the Apple Media Services Terms and Conditions) also applies alongside these terms; where the two conflict on a matter Apple requires it to control, Apple's terms govern.

2. What Clef is

Clef is a sight-reading and music-theory practice app. Clef for iOS is a native app with treble and bass single-note reading, ledger lines, intervals, key signatures, five-finger patterns, triads, scales and arpeggios, MIDI keyboard input, and a spaced-repetition scheduler that resurfaces what you're forgetting. The free web version at clefdrills.com runs entirely in your browser: a treble-clef note-naming drill with optional MIDI keyboard input. Nothing here is a substitute for instruction from a qualified music teacher. It's a practice tool, not a course.

3. Subscriptions and purchases

Treble and bass single-note reading drills stay free in Clef for iOS, with no account and no payment required. The full training system, intervals, key signatures, chords, scales, spaced repetition, custom lessons and analytics, is available through the following options, purchased in-app via Apple's StoreKit / In-App Purchase system:

• Annual, $39.99/year (about $3.33/month, billed annually).
• Monthly, $6.99/month.
• Lifetime, $99.99, a one-time purchase with no recurring charge.

If you previously bought Clef's original one-time $9.99 unlock, you keep full access to everything you paid for, forever, at no additional cost. You don't need to buy Lifetime or subscribe again.

Billing and renewal. Payment is charged to your Apple Account at confirmation of purchase. Annual and Monthly subscriptions automatically renew for the same term unless you cancel at least 24 hours before the current period ends; your Apple Account is charged for renewal within 24 hours before the end of the current period, at the then-current price.

Managing and cancelling. Manage or cancel a subscription any time in your device's Settings app: Settings > [your name] > Subscriptions, then select Clef. Cancelling stops future renewals but doesn't refund the current period; you keep access through the end of the period you already paid for.

Payment processing. All purchases are handled entirely by Apple. Clef never sees or stores your card number, billing address, or other payment details. Refund requests go through Apple, not Clef, in accordance with Apple's Media Services Terms and Conditions and the App Store's refund policies.

Prices are shown in USD and may vary by region and currency due to taxes and Apple's local pricing tiers. We may change prices for future billing periods; where required, we'll give notice before a price change takes effect for an active subscriber.

4. License to use the service

We grant you a personal, non-exclusive, non-transferable, revocable license to use Clef for iOS and the web trainer for your own practice, subject to Apple's usage rules for the App Store where applicable. You may not resell access, embed the trainer in another product, systematically scrape or bulk-download its content, or attempt to bypass or circumvent the app's subscription or purchase restrictions. This license ends automatically if you violate these terms.

5. Acceptable use

• Don't attempt to reverse-engineer, decompile, or extract the underlying drill logic, note-scheduling algorithm, or staff-rendering code, on iOS or on the web, beyond what's naturally exposed by your device or browser.
• Don't attempt to unlock paid features without a valid purchase or subscription, or interfere with Apple's receipt validation.
• Don't use the service in any way that violates applicable law, infringes someone else's rights, or attempts to disrupt or overload the app, the site, or its infrastructure.

6. Your data and notifications

Clef for iOS keeps your practice data, sessions, streaks, and spaced-repetition scheduling, on your device, synced through your own iCloud account if you have iCloud enabled. There's no Clef account or login. If you opt in, the app can send you local practice-reminder notifications; you can turn these off any time in iOS Settings. See the Privacy Policy for the full picture of what is and isn't collected.

7. Intellectual property

"Clef" and the Clef mark, the app and site design, and the app's, drill's, and site's original code and content are owned by Clef's operator, except where noted. Music notation glyphs are set in Bravura, licensed under the SIL Open Font License, with attribution retained throughout the app and site. Nothing in these terms transfers ownership of any of that to you. You're licensed to use the service, not to copy its design or code elsewhere.

8. Third-party links

This site and its blog link out to other independent tools and services (for example, in the blog posts and the site footer). Those are informational references, not endorsements or paid placements unless explicitly labeled, and we're not responsible for the content, availability, or practices of sites we don't operate.

9. No warranty

Clef is provided "as is" and "as available," without warranties of any kind, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, or non-infringement. We don't guarantee the app or trainer will be error-free, uninterrupted, or available at any given time. Clef is an actively developed, largely solo-built product, and features may change as it evolves.

10. Limitation of liability

To the fullest extent permitted by law, Clef's operator isn't liable for any indirect, incidental, special, or consequential damages arising from your use of, or inability to use, the service, including lost practice time, lost data (such as a browser-local best-streak value cleared by clearing site data), or any other intangible loss. Your only remedy for dissatisfaction with the service is to stop using it and, for purchases, to request a refund from Apple.

11. Changes and termination

We may change, suspend, or discontinue any part of the service, including the free web trainer or specific paid features, at any time, and may update these terms as the product evolves. Material changes will update the "last updated" date above. Continued use of Clef after a change means you accept the updated terms.

12. Contact

Questions about these terms: email [email protected]. See also our Privacy Policy and Support page.