Privacy Policy

1. Overview

GrindMute is a local-first mobile app that helps you notice sounds that may resemble teeth grinding while you sleep. This Privacy Policy applies to the GrindMute mobile app and the website at grindmute.com.

GrindMute is published by Zamrudila; the Google Play listing identifies the developer as Ali Durmaz. Contact us at hi@grindmute.com. You do not need a named GrindMute account for core features. The app may create pseudonymous identifiers for its services, as described below.

2. Microphone audio and saved clips

Microphone access

GrindMute needs microphone permission to listen for possible grinding sounds during a Night Session. The app does not listen until you start a session and the operating system grants permission.

On-device processing

Audio analysis takes place on your phone. Raw microphone audio is not sent to GrindMute servers or to third-party analytics services for analysis.

Short clips

When GrindMute identifies a potentially relevant sound, it may save a short audio clip in the app’s local storage so you can review it. The purpose is to keep reviewable moments, not a conventional full-night recording.

No training contributions

The current app does not upload saved clips or your Grinding / Not Grinding labels to GrindMute for model training. You may still choose to export or share a clip using your device’s sharing options.

3. Earlier training data contributions

Earlier versions offered an optional feature for contributing reviewed and labeled clips to improve detection. The current app no longer offers this feature or uploads clips for training, even if you previously opted in. An older version may still show the former option; updating the app removes it.

Previously contributed clips and their labels may still be retained with technical context and a pseudonymous identifier. The earlier feature was offered on the basis of consent, which you may withdraw by requesting deletion. This update does not automatically delete them. To request deletion, contact hi@grindmute.com; we may need enough information to locate the relevant records.

4. Other data GrindMute handles

Data stored locally

The app stores session timing, possible event metadata, saved clips, review labels, settings, reminders and report data on your device. Optional check-ins can include stress, jaw pain, habits and symptoms, as well as custom factors you name. These observations may reveal health-related information. The app compares observations with reviewed sounds on the device to show patterns; a pattern does not establish a cause. GrindMute does not provide automatic cloud sync for this information.

Anonymous authentication

The app may use Firebase Authentication to create an anonymous identifier. Google processes this identifier and related technical information to support authentication without asking for your name, email address, or password. It is not a public profile and does not make the product account-first.

Usage analytics

Firebase Analytics may collect app instance and device identifiers, technical information, screen views and usage events. Events can include SDK session identifiers, timing, recording duration, settings and purchase events. Earlier app versions may also send recording identifiers, detection counts and review labels. Audio and personal factor answers are not sent in these events. Analytics is enabled by default and can be turned off in Settings; turning it off does not erase information already collected.

Purchases and subscriptions

RevenueCat and the relevant app store may process a pseudonymous app user identifier, product and entitlement information, transaction status, store, country or locale information, and technical details needed to validate access. GrindMute does not receive your full payment card details.

Support messages

If you email hi@grindmute.com, we receive the contact details and content you choose to provide. Please do not attach audio or sensitive health information unless it is necessary and you intend to share it.

Website data

The current public website does not use advertising trackers or set GrindMute analytics cookies. Standard hosting infrastructure may process IP address, user-agent, request time, and requested URL in security and access logs.

5. How data is used

We use the limited information described above to:

• provide Night Sessions, clips, reports, reminders, and your chosen settings;
• authenticate the app pseudonymously, understand feature use and improve reliability;
• validate purchases and restore entitlements where paid features are offered;
• respond to support requests and investigate reliability or security issues;
• comply with legal obligations and protect GrindMute, its users, and others.

Information is collected through your use of the app or website, the choices you enter, purchases and messages you send us. Earlier contributions were collected with your consent. You can withdraw that consent by requesting deletion. We do not sell your microphone audio or use it for targeted advertising.

6. Service providers and disclosures

GrindMute relies on a limited set of providers for functions that cannot be delivered solely on your device:

• Google Firebase Authentication for pseudonymous app authentication and Firebase Analytics for app usage measurement;
• Google Cloud Storage for Firebase and Cloud Firestore may retain clips and labels contributed using earlier versions, as described in section 3;
• RevenueCat for purchase and entitlement infrastructure when billing is enabled;
• Apple App Store and Google Play for app distribution and payment processing;
• website and email infrastructure providers for hosting, security, and support communications.

These providers process data under their own terms and privacy commitments. Earlier contributions may remain with the storage providers described in section 3.

We may disclose information if required by applicable law, legal process, or a valid government request; to investigate fraud, abuse, or security issues; or as part of a business reorganization subject to applicable law. Because core audio and Night Session data remain local, GrindMute ordinarily does not possess that content to disclose.

7. Retention, exports, and security

Local retention

Saved clips, night history and observations are stored on your device. You can delete them in the app. Removing the app or clearing its data may also remove local data; device backups and operating-system behavior may preserve copies outside the app’s control. Deleting app data in Settings retains app settings and does not delete provider records or copies you exported.

User-initiated exports

If you choose to export or share a clip, PDF report or history backup, a copy leaves GrindMute’s local storage at your direction. Reports and backups can contain personal observations and review data; history backups do not include audio. The destination you choose, such as email, cloud storage, messaging, or another device, then controls that copy under its own privacy and security terms.

Service data

Authentication, analytics, purchase, security and support records may be retained for the time needed for their purposes, legal obligations, disputes or abuse prevention. Previously contributed clips may remain until deleted. Retention periods can depend on provider settings and legal requirements; deleting local app data does not automatically remove these records.

Security

We use reasonable technical and organizational measures appropriate to the data we process. No device, storage system, or transmission method is completely secure, so absolute security cannot be guaranteed.

8. Your choices and privacy rights

• Microphone: refuse or revoke permission in system settings. Night Sessions cannot work without it.
• Clips and nights: delete individual clips or delete local nights, clips and observations in Settings. Settings are retained.
• Analytics: turn usage analytics off in Settings.
• Reminders and notifications: keep them off or change permission in system settings.
• Exports: choose whether and where to share a copy.
• Earlier contributions: email us to request deletion of clips you previously contributed.
• Support data: contact us to request access, correction, or deletion where applicable.

Depending on applicable law, you may have rights to learn about processing, access, correct or delete personal data, restrict or object to processing, receive a portable copy, and withdraw consent where processing relies on it. Turkish law also provides rights concerning recipients, automated analysis and compensation where applicable. To make a request, email hi@grindmute.com. We may need information sufficient to verify and locate the relevant pseudonymous record. You may also have the right to complain to your local data-protection authority.

9. Children and regional age requirements

GrindMute is not directed to children under 13. If local law requires a higher minimum age or parental consent for digital services, that requirement applies. If you believe a child has provided personal information to us contrary to applicable law, contact hi@grindmute.com.

10. International processing

Service providers may process technical, analytics, purchase, support or earlier contribution data in countries other than your own. International transfers are subject to applicable data-protection law. Contact us for information about the transfer arrangements applicable to your data. Audio processing and current saved clips remain on your device unless you intentionally export them; earlier contributions are described in section 3.

11. Changes to this policy

We may update this policy as GrindMute develops, providers change, or legal requirements evolve. The effective date and version at the top will identify the current policy. If a change materially affects how the app handles data, we will provide notice in the app or through another appropriate channel.

12. Contact

Questions or privacy requests can be sent to hi@grindmute.com.

GrindMute, published by Zamrudila
Developer listed on Google Play: Ali Durmaz
Soğukkuyu Mah. Girne Bulvarı Gültekin Apt. No:208, 35520 Bayraklı/İzmir, Türkiye
grindmute.com