Last updated 12 September 2026

Terms of use.

SleepFast is an iPhone app from YUZI, Netherlands, designed to support a calmer bedtime. Contact us at info@yuzi.nl.

General wellness

SleepFast provides breathing guides, relaxation exercises, sounds, and personal sleep check-ins. It does not diagnose, treat, cure, or prevent any disease, and it does not guarantee that you will fall asleep or improve a health condition. Camera pulse estimates are approximate relaxation feedback, not medical readings. Sleep insights reflect your own entries, not a clinical sleep measurement.

Use exercises comfortably, stop if you feel unwell, and do not use the app while driving or doing anything that needs your full attention. Seek qualified medical advice for persistent sleep problems or health concerns.

Free features and Premium

Core features are available without purchase. Optional Premium subscriptions and a one-time lifetime unlock provide additional features. Available plans, local prices, included features, and any eligible trial are displayed in the app before purchase.

Payment is charged to your Apple Account when confirmed. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours before the end of the period. A trial, if offered and accepted, converts to the displayed paid subscription unless cancelled in time. You can manage or cancel subscriptions in iPhone Settings → your name → Subscriptions. Deleting the app does not cancel a subscription.

The lifetime option is a one-time purchase for Premium access without a recurring subscription. Restore eligible purchases using the same Apple Account. Refund requests and billing are handled by Apple at reportaproblem.apple.com. Your statutory consumer rights remain unaffected.

App licence and availability

The app is licensed under Apple's Standard End User Licence Agreement. You may use it for personal, lawful purposes. Features may depend on device hardware, iOS version, Apple services, permissions, or an active Premium entitlement. On-device AI requires compatible hardware and software; built-in guidance is used when unavailable.

Your information

Our privacy policy explains local app storage, optional Apple services, website logs, and support correspondence. Keep device backups if you want to preserve your local records.

Responsibility and changes

We aim to keep SleepFast useful and reliable, but uninterrupted or error-free operation cannot be guaranteed. To the extent permitted by law, the app is provided as available. Nothing in these terms excludes liability or rights that cannot legally be excluded.

We may update the app and these terms. Material changes will be communicated where required. Contact info@yuzi.nl with questions.