Filament

Privacy Policy — Filament

Last updated: July 13, 2026

Filament (the “App”, the “Game”) is a one-line light-drawing puzzle game developed by Birkin Apps (“we”, “us”). This Privacy Policy explains what data the App collects, why, and your choices. Filament does not require an account — play is anonymous.

Summary

Data we collect and why

1. Anonymous usage analytics

The App uses Google Firebase Analytics to record anonymous gameplay events — for example, that a level was started, completed, or a hint was used — together with an app-instance identifier, device/OS model information, and coarse (country-level) location derived from your IP address. Purpose: understanding which puzzles are too hard or too easy and improving the game. These events are not linked to your name, email, or advertising ID, and are not used for advertising or cross-app tracking.

2. On-device settings & progress

Your settings (language, theme, sound) and puzzle progress are stored locally on your device using shared_preferences. This data never leaves your device. Uninstalling the App deletes it.

Data we do NOT collect

We do not collect your name, email address, phone number, precise location, contacts, photos, or health data. There is no social login, no user account, no advertising, and no in-app purchase. We never read your device’s advertising identifier, so no App Tracking Transparency (ATT) prompt is needed on iOS.

Third parties (sub-processors)

Measurement domain used: app-measurement.com. No advertising domains are contacted.

Your choices & rights

Data deletion

To request deletion of analytics data linked to your app instance, email support@birkinapps.com. You can delete all local data by uninstalling the App.

Children

Filament is intended for a general audience and is not directed to children under 13. The App shows no ads; analytics is anonymous and restricted in line with COPPA and GDPR-K.

Store privacy disclosures

Consistent with Apple’s App Privacy and Google Play’s Data Safety, we declare: Product Interaction and Diagnostics-adjacent usage data (analytics; not linked to identity; not used for tracking). No other data types are collected.

Changes

We may update this Policy; the “Last updated” date reflects the latest version.

Contact

Birkin Apps — support@birkinapps.com