F8t - Light Meter for Film

F8t turns your iPhone into a precision light meter and shot archive for film. One free roll, then upgrade once to unlock everything for life.

Precision metering for film photography. F8t turns your iPhone into a pro light meter and a complete shot archive. Built by analog photographers, for analog photographers.

From your first roll to zone system mastery, F8t reads scene light through your iPhone camera and gives you the exposure your film actually needs. No more guesswork. No more wasted frames. Just confidence behind every shutter click.

EVERYTHING YOU NEED TO METER

• Real-time light metering through the iPhone camera sensor • Three free metering modes: Average, Center-Weighted, Incident • Aperture priority and shutter priority: pick what matters, F8t solves the rest • Color temperature display in Kelvin • Smart warnings: handheld shake, diffraction, dynamic range, ND suggestion, low light, bulb mode • Composition guides: rule of thirds, golden spiral, diagonals, triangle, grid, center cross. All seven, free • Depth of field calculator with hyperfocal distance, format-aware • Sun calculator with sunrise, sunset, golden hour, and blue hour times • Filters: ND, CPL, UV, GradND with combined-stop math • 30+ film simulation previews

YOUR FILM ARCHIVE

• Track every roll, every frame • Log shots with date, equipment, GPS location, and notes • Reference photo cards saved to your camera roll • Frame counter per roll with skip-frame support • Roll lifecycle: Active → Done → Developed • Equipment library with 500+ cameras, lenses, films, filters, and flashes • Mark shots successful or favorite after development • Photography tips for every skill level: beginner to zone master

UNLOCK F8T PRO (one-time purchase, yours forever)

• Spot, multi-spot, and zone system metering: up to 3 spots with EV spread • Seven auto recommendation modes: Balanced, Freeze Motion, Motion Blur, Max Sharpness, Max DOF, Handheld Safe, Minimize Reciprocity • Four exposure strategy profiles: Balanced, Highlight Priority, Shadow Priority, Film Optimized • Reciprocity correction for long exposures (film-specific p values) • Flash calculator: manual + fill modes, GN math, leaf shutter sync • ARKit LiDAR distance measurement on supported devices • Push/Pull tracking with development badges • Expired film compensation • Unlimited cameras, lenses, films, film backs, rolls, and shot log • Service history tracking for cameras and lenses • Shooting statistics, roll insights, and your shareable Shooting Signature • Export your archive: CSV, PDF, JSON, and ExifTool scripts for embedding EXIF into scans • Sun position widget for your home screen • Golden hour and blue hour push notifications

THE FREE EXPERIENCE

Your first roll is on us. Whichever film you load 12, 15, 24, or 36 frames you get the complete F8t experience: real-time metering, every composition guide, every warning, every film stock preview, every shot logged with reference photo and EXIF. When you finish that first roll and reach for the second, that is when F8t Pro unlocks the rest. One purchase, no subscription, no expiry.

PRIVACY FIRST

Your shots, equipment, and roll history stay on your device. We never see them. No advertisers, no third-party data sharing, no cross-app tracking. Read the full policy at f8t.app/privacy.html.

LOCALIZED FOR PHOTOGRAPHERS WORLDWIDE

Available in English, Spanish, German, Japanese, French, Korean, Brazilian Portuguese, Simplified Chinese, Italian, and Dutch.

Shoot more film. Define your focal point. F8t.