Latenta – Film Roll Logbook

Latenta is the logbook for people who still shoot film. Log every frame, never lose count, and always know where you are on the roll.

🎞️ THE ROLL, FRAME BY FRAME
✅ Frame counter always in view: one tap logs a frame
✅ A card for every shot: aperture, shutter speed, lens, subject and notes
✅ Bracketing ±1 logged with a single tap
✅ 25 film stocks built in, with their speed
✅ Half frame: the count doubles by itself
✅ Expired film: it suggests the EI to compensate with
✅ Full roll lifecycle: loaded, in progress, finished, developed, archived

☀️ BUILT-IN LIGHT METER
✅ Meter with your phone's light sensor, or with the Sunny 16 rule
✅ Suggested shutter/aperture pairs for the ISO of the roll you loaded
✅ Reciprocity failure correction for long exposures
✅ Tricky light guide: backlight, snow, indoors, night

🧪 DARKROOM
✅ Development timer with timed agitation and an audible cue
✅ Time chart by film and developer
✅ Development notes saved with the roll
✅ "Develop this roll" reminder if it sits in your bag too long

📊 STATS AND SPENDING
✅ How many rolls a year, which stocks you use most, which lens you favour
✅ Cost per roll and yearly average: you finally know what shooting costs you
✅ CSV export of everything, and share a roll with one tap

📍 WHERE YOU SHOT IT
✅ Optional geotag on a frame, stored on your phone only

🔒 EVERYTHING STAYS ON YOUR PHONE
Rolls, frames, notes and locations are saved on your device only. No account, no sign-up, no servers of ours. It works fully offline, in the darkroom or up a mountain.

📺 FREE, WITH ADS
Latenta is free thanks to discreet ads that never appear while you are logging a frame. Prefer quiet? Watch a short video and enjoy 24 hours with no ads.

🌍 12 LANGUAGES
English, Italian, Spanish, French, German, Portuguese, Japanese, Chinese, Russian, Turkish, Arabic and Hindi.