Privacy
Zone Light Meter is local-first. Nothing about your shooting habits, your rolls, your gear, or your usage of the app leaves your phone unless you explicitly export it. This page is the long version.
Last updated: 14 May 2026
What the app stores
Everything the app records, including your gear profiles, film stocks, rolls, shot logs, calibration data, and preferences, is stored in a local SQLite database on your device. Nothing is uploaded. Nothing is sent to a server. There is no account because there is nothing on a server to log into.
What the app does not collect
- No analytics SDKs (no Firebase Analytics, no Mixpanel, no Amplitude)
- No crash reporting that includes personal data
- No third-party advertising identifiers
- No location tracking
- No usage telemetry
- No A/B testing services
What the app needs network access for
The app uses network only when you explicitly ask it to:
- Weather and UV data: optional, only fetched on demand if you tap the weather widget. Coordinates are sent to the weather provider only for that single request.
- Ephemeris updates: optional, only when you refresh sun and moon data for a new location.
- Community film profile downloads: optional, only when you tap to fetch the latest community calibration data.
Everything else works fully offline.
What permissions the app requests
- Camera: required for metering. Used only while you are actively looking through the viewfinder.
- Location: optional. Used only if you enable ephemeris features and want them to know where you are.
- Storage: used to write CSV exports if you choose to export your roll data.
- Notifications: optional. Used by the bulb timer and a few reminders.
What you can export and delete
Everything in the app's database is exportable as CSV. There is no proprietary format; you can keep your data even if you stop using the app. Uninstalling the app removes the database.
About this website
zonelightmeter.com is a static documentation site hosted on Cloudflare Pages. It does not set tracking cookies. It does not run analytics scripts. It does not load fonts from Google. The search index is computed at build time and runs entirely in your browser. Cloudflare collects standard request logs for security purposes; see Cloudflare's privacy policy for details on those.
How to contact us
Email privacy@zonelightmeter.com with any privacy question.