Privacy Policy & Legal Notice

Effective date: 2026-05-26 · Last updated: 2026-05-26

Authoritative version. This document is published only in English. Translations, if any, are provided for convenience and have no legal effect. In any dispute, the English text controls.

Tilin is a notification alert application that monitors notifications from apps you choose and triggers configurable alerts (flashlight blinks, vibration patterns, audio tones). This document explains what data the application processes, on what terms it is provided, and the limits of any liability of the developer.

Important — Not for safety-critical use

Tilin is a convenience tool. It is not a medical device, not a life-safety system, not an emergency alerting platform, and not a substitute for hearing aids, professional medical equipment, or human supervision. Do not rely on Tilin to deliver, detect, or escalate notifications related to health, safety, security, fire, smoke, gas, intrusion, child or elder monitoring, emergency services, or any situation where a missed or delayed alert could result in injury, loss, damage, or harm. You alone are responsible for maintaining independent, redundant means of notification for any such situation.

Summary

Tilin requests no INTERNET permission. The application cannot transmit data off your device.
No analytics, no tracking, no telemetry, no third-party SDKs other than Google Play Billing for optional purchases.
No CAMERA permissionis requested. The flashlight is operated through Android’s torch API.
All data is processed and stored locally on your device only.
The application is provided “AS IS”, without warranty of any kind, and the developer’s liability is limited to the maximum extent permitted by applicable law.

1. Data collection

Tilin does not collect, transmit, sell, share, or monetize any personal data. All processing takes place locally on your device.

1.1 Local-only data

The following data is stored locally on your device, typically in an encrypted Room database. None of it is transmitted, uploaded, backed up to any service operated by the developer, or shared with any third party by the developer:

App rules: per-app alert configuration (which apps, blink timing, vibration patterns, sound settings, schedules).
Event log: timestamped notification triggers, service-health checks, and permission changes. Auto-purged after 30 days.
Service health log: heartbeat records confirming the background service is running. Auto-purged after 90 days.
Calibration / audiogram data: frequency preferences and hearing data you choose to enter, stored locally for alert-tone optimization.
Purchase state: a local boolean reflecting your Google Play Billing entitlement for optional premium features.

1.2 Notification content

To determine how to trigger alerts, Tilin reads notification metadata (package name, category, importance). Notification text may be examined transiently in memory for urgency classification and is then discarded. Notification text is not written to disk and is not transmitted.

2. Permissions

Tilin requests only the permissions strictly required to deliver alerts. Permissions are explained in-app before any system dialog. Notable points:

Notification Listener access — to detect incoming notifications and trigger alerts.
Foreground Service / Boot Completed — to keep the alert service running reliably and restart it after device reboot.
Post Notifications — to display service status and error notifications.
Battery Optimization Exemption — to prevent Android or OEM optimizations from killing the service.
Vibrate, Schedule Exact Alarm, DND access — to produce alerts, schedule quiet hours, and allow critical alerts to bypass Do Not Disturb when you choose to enable that.
Read Calendar — when enabled by you, used in-memory only for context switching; not stored, not transmitted.
No CAMERA permission is requested or used.
No INTERNET permission is requested or used. This is a technical guarantee enforced at the manifest level, not merely a policy promise.

3. Third parties

Tilin contains no analytics SDKs and no crash-reporting SDKs. The only third-party integration is Google Play Billing, used solely to process optional one-time purchases. Your use of Google Play is subject to Google’s own terms and privacy policy, which the developer does not control.

The application is distributed through the Google Play Store and runs on top of the Android operating system and OEM-customized firmware (Samsung One UI, Xiaomi MIUI/HyperOS, OPPO ColorOS, etc.). The developer has no control over the behavior, defects, policies, or modifications introduced by these third-party platforms, vendors, or device manufacturers, and disclaims all responsibility for any failure of Tilin caused or contributed to by them.

4. In-app purchases

Tilin offers optional one-time purchases through Google Play Billing. There are no subscriptions, no recurring charges, and no auto-renewal initiated by Tilin. Refunds, chargebacks, and billing disputes are governed by Google’s policies and are processed by Google, not by the developer.

5. Data retention and deletion

Event logs are auto-purged after 30 days.
Service-health logs are auto-purged after 90 days.
App rules and other configuration are retained until you delete them or uninstall the application.
Uninstalling Tilin deletes all local application data managed by the application.

6. Children

Tilin is not directed to, and is not intended for, children under the age of 13 (or the equivalent minimum age in your jurisdiction). The application does not collect data from anyone, including children.

7. Disclaimer of warranties

THE APPLICATION IS PROVIDED “AS IS” AND “AS AVAILABLE”, WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND. To the maximum extent permitted by applicable law, the developer disclaims all warranties, whether express, implied, statutory, or otherwise, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, non-infringement, title, accuracy, reliability, availability, uninterrupted operation, error-free operation, freedom from viruses or other harmful components, or that defects will be corrected.

Without limiting the foregoing, the developer does not warrant that: (a) the application will detect every notification; (b) any alert will be delivered, delivered on time, perceived by you, or perceived by anyone else; (c) the application will continue to operate after a system update, OEM update, battery-optimization decision, permission change, or background-process kill by your device or operating system; (d) the application is compatible with your particular device, firmware, accessory, or configuration; or (e) the application will be free of bugs, defects, regressions, or outages.

You acknowledgethat mobile operating systems, OEM customizations, accessibility services, notification listeners, foreground services, exact-alarm scheduling, Do Not Disturb modes, battery optimizations, and hardware (LED, vibrator, speaker) are outside the developer’s control and can prevent, delay, or alter alert delivery in ways the developer cannot anticipate or prevent.

8. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE DEVELOPER, ITS OWNERS, AFFILIATES, CONTRIBUTORS, OR SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, or for any loss of profits, revenue, data, goodwill, opportunity, use, or other intangible losses, arising out of or in any way connected with: (a) your use of, or inability to use, the application; (b) any missed, delayed, duplicated, or unintended alert or notification; (c) any reliance you place on the application for any purpose; (d) the conduct of any third party, including OEMs, carriers, accessory makers, or Google; (e) any modification, suspension, or discontinuation of the application or any feature; (f) any error, bug, vulnerability, or security incident; or (g) any other matter relating to the application — whether based in contract, tort (including negligence), strict liability, or any other legal theory, and whether or not the developer has been advised of the possibility of such damages.

In any jurisdiction that does not allow the exclusion of certain warranties or the limitation or exclusion of liability for certain types of damages, the developer’s total cumulative liability to you for all claims arising out of or relating to the application shall not exceed the greater of (i) the amount you paid to the developer for the application in the twelve (12) months preceding the event giving rise to the claim, or (ii) ten United States dollars (USD 10.00).

9. Assumption of risk and user responsibility

You use the application at your sole risk. You are solely responsible for: (a) the apps you choose to monitor and the notifications you choose to act upon; (b) configuring, maintaining, and verifying the alert behavior on your device; (c) keeping your operating system, firmware, and the application updated; (d) granting and reviewing the permissions Tilin requests; (e) maintaining independent, redundant means of notification for any matter of importance, including health, safety, security, work-critical, child-care, elder-care, or emergency situations; and (f) any consequences resulting from your decision to install, configure, or rely on the application.

10. Indemnification

To the maximum extent permitted by applicable law, you agree to indemnify, defend, and hold harmless the developer and the developer’s owners, affiliates, contributors, licensors, and suppliers from and against any and all claims, demands, actions, losses, damages, liabilities, costs, and expenses (including reasonable attorneys’ fees) arising out of or relating to: (a) your use or misuse of the application; (b) your violation of this notice; (c) your violation of any applicable law or any right of any third party; or (d) any reliance you or any third party places on the application’s output, alerts, or behavior.

11. No professional advice; no warranty of accessibility

Although Tilin is designed with the Deaf and hard-of-hearing community in mind, no representation or warranty is made that the application meets any specific accessibility standard, statute, or regulation in any jurisdiction. Nothing in the application constitutes medical, audiological, safety, security, or legal advice. Consult an appropriately qualified professional for any such matter.

12. Open-source components

The application may include open-source software distributed under its own license terms. Those terms govern the corresponding components and, where they conflict with this notice with respect to those components, the open-source license terms control for that component only.

13. Modification, suspension, discontinuation

The developer may modify, suspend, or discontinue the application or any feature, at any time, with or without notice, without liability to you or any third party. The developer may update this notice at any time; the updated version will be posted on this page with a new “Last updated” date and will take effect upon posting.

14. Governing law and venue

This notice and any dispute arising out of or relating to the application shall be governed by and construed in accordance with the laws of the Republic of Colombia, without regard to its conflict-of-laws provisions. Any dispute that cannot be resolved informally shall be brought exclusively in the competent courts of Medellín, Antioquia, Colombia, and you consent to the exclusive jurisdiction and venue of those courts. Nothing in this section limits any non-waivable rights you may have under the mandatory consumer-protection laws of your country of residence.

15. Severability and entire agreement

If any provision of this notice is held to be unenforceable, that provision shall be modified to the minimum extent necessary to make it enforceable, or, if it cannot be so modified, severed, and the remaining provisions shall remain in full force and effect. This notice, together with any other terms expressly referenced herein, constitutes the entire agreement between you and the developer regarding the application and supersedes any prior or contemporaneous understandings.

16. Contact

For questions about this notice, please open an issue on the project’s public repository or contact the developer through the support channel listed on the Google Play Store listing.

This document is provided for informational purposes and does not constitute legal advice. It may not address every legal requirement applicable to you. The English version of this document is the only authoritative version.