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Lumen Log — Film Shot Logger

A logbook for analog photographers that writes real EXIF back onto the scans.

Year
2025

Status

  • In TestFlight, v1.0 — public release coming soon
  • iPhone, iOS 26+ (iPad and macOS planned)
  • Free, with a $4.99 one-time Premium unlock
  • 1,395 film stocks and a camera database, bundled offline
  • Built with SwiftUI, The Composable Architecture and GRDB
  • In development since November 2025

What it does

An analog photography logbook that keeps the metadata a film camera never records, so every frame reaches the scanner with its settings and its location attached:

  • Rolls with film stock, ISO, camera and frame count, archived once they’re finished
  • Aperture and shutter speed dialled in on ruler sliders, one entry per frame
  • Every shot geotagged and reverse-geocoded to a city and country, with a flag strip per roll
  • Imported photos matched to logged frames, writing the settings into the scan’s EXIF
  • Year in Review — a world map of every frame, countries visited, most-used stock, monthly activity, and a card you can share
  • iCloud sync across devices
  • An offline film stock library, searchable by name or manufacturer, with recently used to hand

Why I built it

I want to keep memories of where I took my film shots. Travelling, I sometimes hit a spot I wouldn’t mind coming back to, and film gives you nothing to go on — no EXIF, no coordinates, no date. The scans come back months later and the roll is a pile of frames I can’t place. So the app records the settings and the location while I’m shooting, and puts them back onto the photos afterwards.

Screenshots

Rolls list showing active and archived rolls

A roll’s frames with shutter speed, aperture and location

The shot editor, with aperture and shutter ruler sliders

Matching imported photos to logged frames

Year in Review, with a world map and the year’s stats

The bundled film stock library


Need help with this project? Contact me.