Privacy Policy - Deeprest

Version: 2026-11-10 (Last Updated: November 10, 2026)

Introduction

Deeprest ("the App") is a white noise and ambient sound application designed to help you sleep, focus, and relax, developed and operated by STELLAR BYTE TECHNOLOGY CORP. ("we", "our"). We do not require account registration. This Privacy Policy explains what information stays on your device, what limited data is processed by our service providers, and how you can exercise your rights.

On first launch we ask you to read and accept this Privacy Policy and the Terms of Service (required to run the App). Anonymous usage analytics is a separate, optional choice that is off by default. Before you accept, the App initializes no third-party SDK and sends no network request.

Information We Do NOT Collect

• We do not require you to create an account
• We do not collect your name, email address, or other direct contact details through the App
• We do not access your contacts, photos, microphone recordings, or other personal device content
• We do not collect precise location data
• The App includes no advertising SDK, shows no ads, does not read the advertising identifier and does not track you across apps

Information Stored Locally on Your Device

The App stores certain data locally using standard device storage so features work as expected. This includes:

• Master volume and your last active mix, so playback can resume where you left off
• Saved favorite mixes (including the names you give them)
• App settings, such as whether playback may mix with other apps
• Sleep log entries created by the sleep timer (date, duration and sounds used, kept for up to 90 days)
• The privacy policy version you accepted and when, the state of the anonymous analytics switch, and whether onboarding is complete
• A local cache of your subscription status, such as whether Deeprest Pro is active and when it expires
• Simple counters used to decide when to show an app review prompt
• On iOS, data shown by the Home Screen and Lock Screen widgets (sounds playing, playback state and the scene preset list), shared with the widget through an on-device App Group container
• The local diagnostic log (see below)

This data stays on your device; we do not upload it to servers we operate. Favorite mix names and the sleep log list are never sent to any third party; however, if you turn on anonymous usage analytics, the usage events listed below (for example the number of minutes a timer was set to) are sent to PostHog.

Local Diagnostic Log

To troubleshoot crashes and errors, the App keeps a diagnostic log in its private directory on your device:

• It records errors only: the time, the part of the App involved, the error type, a redacted error description (first line only, quoted text masked), up to 12 lines of the program call stack, the app version and the operating system type
• It does not record names you type, such as favorite names, and contains no identifiers
• It keeps at most 200 entries or 256 KB; the oldest entries are deleted first
• It is never uploaded automatically. It leaves your device only if you copy it in Settings > Privacy > Export diagnostic log and send it to us yourself
• You can delete it with Settings > Privacy > Clear local data

Anonymous Usage Analytics (Optional)

Anonymous usage analytics is off by default. The App starts PostHog and sends analytics events only after you turn on "Anonymous usage analytics" on the consent screen or in Settings > Privacy; turning it off stops sending immediately and resets the analytics identifier generated on your device.

When it is on, we use PostHog to collect pseudonymous product analytics to understand how Deeprest is used and improve it. Events are associated with an identifier randomly generated on your device, not with your name, email, or store account. The events are:

• App lifecycle events, such as install, update, open and moving to the background
• Onboarding start, skip and completion, and a consent event when you turn analytics on
• Sound play and stop, including which built-in sound was played and for how long (seconds), and the first play
• The number of sounds when you save a favorite (not its name), where a mix was loaded from, and scene preset use
• The number of minutes a sleep timer was set to and how, and timer completion
• Paywall views and dismissals, plan loading results, the selected plan, the product identifiers, prices and currency shown, and Pro limit prompts
• Purchase and restore flow events, such as start, success, cancellation, pending approval or failure (with the error description)

In the normal course of providing its service, PostHog also processes standard technical information such as app version, device model, operating system and version, language and time zone, screen size, timestamps, and the IP address of the request (which may be used to infer an approximate region). We use this data to measure feature usage, troubleshoot and improve the product, never for advertising.

Subscription and Purchase Information

Deeprest offers an optional paid subscription called Deeprest Pro. We use RevenueCat to manage subscription status, and purchases are processed by the Apple App Store or Google Play. After you accept the Privacy Policy and Terms of Service, the App starts RevenueCat so it can check and restore your subscription status.

When you purchase, renew, cancel, or restore a subscription, RevenueCat and the relevant store may process:

• A randomly generated app user identifier
• Store product identifiers, purchase receipts and transaction status
• Entitlement status, renewal and expiration dates
• App version, operating system version, store country or region, and the IP address of the request

Only if you turned on anonymous usage analytics do we link your RevenueCat subscription record to the same random analytics identifier used by PostHog, so we can understand which features lead to subscriptions. After you turn analytics off, no new link is made and we try to delete the analytics identifier attribute stored at RevenueCat.

We do not receive or store your card details. Billing and payment processing are handled by Apple or Google under their own terms and privacy policies.

Siri Shortcuts

On iOS, you can use Siri Shortcuts to play or stop sounds. Siri requests are handled by Apple under Apple's own privacy terms. The App receives only the action to perform, not your voice recording.

Third-Party SDKs and Services

• PostHog (PostHog, Inc., USA): optional anonymous usage analytics, active only after you turn it on; processes the usage events, random identifier and technical information described above. Privacy policy: https://posthog.com/privacy
• RevenueCat (RevenueCat, Inc., USA): subscription management, active after you accept the Privacy Policy; processes a random user identifier, purchase receipts, transaction and entitlement status and technical information. Privacy policy: https://www.revenuecat.com/privacy
• Apple App Store / Google Play (Apple Inc. / Google LLC): billing, renewals, cancellations and restores, under their own privacy policies

You can also view this list in Settings > Privacy > Third-party SDKs.

How We Use Information

• Provide and remember your app settings, saved mixes, and sleep log
• Operate Deeprest Pro subscriptions and support restore purchases
• When you turn on anonymous usage analytics, measure feature usage, understand which features lead to subscriptions, and improve the product
• When you send us the diagnostic log, troubleshoot and fix problems

Information Sharing

We do not sell your personal information. We share limited information only with service providers needed to operate subscriptions and, when you turn it on, anonymous usage analytics: PostHog, RevenueCat, and the relevant app store billing platform.

International Data Transfers

PostHog and RevenueCat process data in the United States. If you are in mainland China or another country or region, subscription information and (when analytics is on) analytics data are transferred to the United States for processing. You can turn off anonymous usage analytics at any time to stop analytics transfers.

Data Retention

• Local app data and the diagnostic log stay on your device until you delete them with Clear local data, uninstall the App, or clear its storage; sleep log entries are kept for up to 90 days
• Analytics data is stored at PostHog for as long as needed for the purposes above and then deleted or anonymized; you can email us at any time to request earlier deletion
• Subscription and transaction records are retained by RevenueCat and the app stores under their own policies and applicable law (for example accounting requirements)

Your Rights and Choices

You can:

• Turn anonymous usage analytics on or off: switch it in Settings > Privacy > Anonymous usage analytics at any time; turning it off stops sending immediately
• Export your data: copy your sleep log as JSON in Settings > Privacy > Export sleep log; favorite mixes can be exported one by one on the Favorites tab
• Delete local data: Settings > Privacy > Clear local data deletes favorites, settings, sleep log, widget data and the diagnostic log and resets your privacy choices; uninstalling the App also deletes this data
• Withdraw consent: turning analytics off withdraws consent to analytics; to withdraw consent to this Privacy Policy, clear local data and stop using or uninstall the App
• Access, correct or delete data processed by third parties: email deeprest@stellarbyte.ca, if possible with your store receipt or order number so we can verify the request
• Manage or cancel your subscription: Settings > Premium > Manage Subscription opens the App Store or Google Play subscription page
• Restore purchases: use the in-app restore purchases option with the same store account

Complaints and Feedback

If you believe we handle your information improperly, or a rights request was not resolved to your satisfaction, email deeprest@stellarbyte.ca. We reply within 15 business days of receipt. You also have the right to complain to the data protection authority where you live.

Children's Privacy

The App is not directed to children under 13 (under 14 in mainland China). If you are below that age, please use the App only with the consent and guidance of a parent or guardian. We do not knowingly collect personal information from children; if you believe a child provided information to a third-party service through the App, contact us and we will review and delete it.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. For material changes, such as to the information collected, its purposes, third parties or your rights, we update the version and ask you to confirm again the next time you open the App.

Contact Us

If you have any questions about this Privacy Policy, please contact us at:

Email: deeprest@stellarbyte.ca
Developer: STELLAR BYTE TECHNOLOGY CORP.
Location: Vancouver, BC, Canada