Cataster

Cataster measures ambient noise using the device microphone, tags each reading withlocation and time, and plots them on a shared map backed by Supabase.
WHAT YOU GET
- 10,900 lines of TypeScript- Expo app with real audio capture and level analysis- Location tagging and map view- Supabase integration for storing and sharing readingsWHAT IS NOT INCLUDED — PLEASE READThe dBFS-to-SPL conversion uses a fixed offset. Microphone sensitivity varies bydevice by roughly ±15 dB, so the absolute values are not calibrated — they areuseful as relative comparisons, not as measurements you could cite.If you ship this, add a per-device calibration flow and label readings accordingly.That is a real piece of work and the price reflects that it is missing.No in-app purchases. UI text is German.

Digital delivery: Source-code package for the stated product. Hosting, domains, paid third-party services, accounts, API keys and credentials are not included unless explicitly stated.