Neon ghosts at dusk
Filament
Spot the dead letter in broken signs before the buzz fades.
Dusk patrol tools
What Filament helps you do on the Buzz canvas.
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01
Buzz canvas cases
Swipe through neon sign puzzles and guess which letter burned out.
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02
Case board archive
Filter solved, unsolved, and bookmarked cases—or capture signs from photos.
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03
Ledger streak stats
Track accuracy, streaks, and dead-letter frequency across your patrol.
App screens
Privacy Policy
Last updated: July 31, 2026
Filament is a neon sign quiz app. Your game progress, captured sign photos, and preferences are stored locally on your device. We do not operate user accounts or collect personal data on our servers.
Photos you import for custom cases stay in the app sandbox unless you share them through iOS share sheets. You can adjust capture retention in Kit settings.
We do not sell data, run third-party ads, or embed analytics SDKs. If you email support, we use your message only to respond.
Contact: yelyzavetadubovaapps@gmail.com
Support
Questions about cases, capture, or streak stats? Email us with your iOS version and a short description.