The Film Friend

The Film Friend is the ultimate companion for film photographers. Whether you shoot large format, medium format, or 35mm, this app puts essential darkroom and field tools in your pocket.

LIGHT METER

Turn your phone into a reliable light meter. Measure scene brightness using your device camera with real-time exposure calculations. Choose between Aperture Priority (Av) and Shutter Priority (Tv) modes. Tap anywhere on the preview to lock spot metering, and monitor tonal range with the live luminance histogram.

EXPOSURE TIMER

Time your long exposures with precision. Audible tick sounds keep you informed without looking at the screen. The timer stays visible on your lock screen via a persistent notification. Your screen stays awake throughout the entire exposure.

RECIPROCITY CALCULATOR

Correct for reciprocity failure with data for 18+ film stocks. Add optical filters from a library of 40+ ND, polarizer, and color correction filters. Factor in bellows extension stops for a final corrected exposure time.

DEVELOPMENT CHART

Access development times for B&W, C-41, E-6, RA-4, and ECN-2 processes. Search and filter by brand, film, developer, and ISO. Save your own custom processes with step-by-step recipes, including agitation schedules and temperatures. Run guided development workflows with a built-in timer, agitation prompts, and step-by-step navigation. Share and import processes with fellow photographers.

FILM HOLDERS

Manage your sheet film holders with per-sheet status tracking (Empty, With Film, Develop). Assign film types with ISO and process info. Add photos and notes to each sheet. View all sheets across holders at a glance. Create custom film types for your inventory.

MIXING CALCULATOR

Calculate precise chemical dilutions for your darkroom chemistry. Supports multi-part ratios in mL, oz, quarts, or gallons.

BELLOWS EXTENSION COMPENSATION

Calculate exposure compensation for large format bellows extension. Enter bellows length and focal length in millimeters or inches, with 1/3 or 1/10 stop precision.

FOCAL LENGTH EQUIVALENCY

Convert focal lengths to their 35mm equivalent across a wide range of sensor and film formats. Instantly see the crop factor and equivalent field of view.

MORE FEATURES

• Export and print film holder data as PDF, CSV, or directly to a printer

• Full backup and restore of all your data

• Customizable darkroom timer themes with spectral color picker

• Development history log with notes

• Light and dark mode

• Localized in 32 languages

The Film Friend is built by a solo developer and film photography enthusiast. Your support and feedback help make it better with every update.