Documentation for Android · v1.0
A precise light meter for film photographers, fully documented.
Zone Light Meter measures, calculates, and logs exposures for analogue cameras. Every modal, every tool, every option is explained here for beginners. Search, read, and learn at your own pace.
- Shipped
- 101
- Partial
- 8
- Sections
- 20
Read the documentation
Every modal, tool, and option in the app has its own page. 109 features across 20 sections. Browse, search, or dive into a section that interests you.
Beginner glossary
ISO, aperture, EV, reciprocity, the zone system. The vocabulary of film photography, explained without jargon.
What's inside
All 20 sections →The Core Exposure Triangle
ISO, aperture, shutter, priority modes, and bulb integration
Advanced Light Reading & Metering Modes
Reflected, incident, spot, zoom, multi-spot, and EV display
Color & Frequency Analysis
Color temperature metering, filter factors, flicker detection
Next-Gen Zone System & AR Mapping
Zone calculator, false-color overlay, histogram, film latitude warnings
Analogue-Specific Compensations
Reciprocity, filter comp, bellows, multi-exposure, expired film, bracketing, IR, pinhole
Flash & Distance Computation
Flash exposure via Guide Number; distance estimation hooks
Sensor Calibration Engine
Per-device calibration workflow, community profiles, drift detection
Film Stock Database
Searchable film library, push/pull profiles, development time database
Cine / Motion Picture Mode
FPS, shutter angle, T-stops, cine film stocks, footage tracking, pulldown
Recently in the build
A small selection of shipped features.
Local-first data ownership
All your data lives in a Room database on your device. No cloud sync.
No ads or third-party tracking
Policy commitment: no advertising, no analytics SDKs, no cross-app trackers.
Full Offline Operation
Every feature works without a network connection.
Everywhere. The whole app runs without a network.
First-run coachmark tour
A short, glowing walkthrough of the viewfinder right after the onboarding wizard.
Runs automatically once after onboarding, gated on camera-ready. Resets only if app data is cleared.
Pin and reorder Tools menu rows
Pin your most-used calculators to the top and drag the rest into the order you want.
Viewfinder > Tools icon > long-press a row to drag, tap pin to move to Pinned
Onboarding Flow What do you shoot
First-run wizard that asks what you shoot and pre-configures sensible defaults.
Runs automatically on first launch; resets if app data is cleared.
Local-first, no tracking, no ads.
The app keeps your rolls, gear, and settings on your phone. The website you are reading has no analytics. Read the privacy policy for the long version.