Support

Email: support@sleeplabengine.com · Payments and refunds: billing@sleeplabengine.com · Response time: [e.g. within 2 business days]

Payments

I paid but Premium / Credits did not appear. Open the Account panel and press “Restore purchases”. Your access is granted when our server receives the payment confirmation from PayOS (Vietnam) or PayPal (other countries); this is normally immediate. If it still does not appear, email us your order code (shown on the payment page) — never send card or bank details.

Does Premium renew automatically? Only if you chose automatic renewal. One-time Premium does not renew.

How do I cancel automatic renewal? PayPal: Account panel → “Cancel automatic renewal” (or in your PayPal account). App Store / Google Play: in your store account's subscription settings — the Account panel has a “Manage in …” button. Premium stays active until the end of the period already paid.

Refunds: see the Terms of Use.

Promo code not accepted: the Account panel tells you why (expired, not for your region or product, already used). Only one discount applies per purchase.

How to use the app: see the User Guide.

Account

Delete my account: Account panel → “Delete account”, then type DELETE to confirm. Your data is deleted immediately; legally required financial records are kept in pseudonymised form (see the Privacy Policy).

Free trial not available: the trial requires Google Sign-In (or Sign in with Apple in the iOS app) and is limited to one per person.

Bought in the App Store / Google Play: open Account → "Restore purchases" while signed in with the same account. Refunds for store purchases are requested from Apple or Google.

Playback

iPhone / iPad: keep the app open or use the lock-screen controls; turn off Low Power Mode for long sessions. The hardware volume buttons control the overall level; the in-app faders control the mix.

Long exports: WAV exports longer than one hour require a desktop browser that can save directly to disk (Chrome or Edge). Use MP3 for long exports on other browsers.

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