FilmMeter vs ShuttR

FilmMeter turns your iPhone into a professional light meter for film cameras. Real-time metering, LiDAR ranging, reciprocity calculation, and exposure logging — one app covers your entire shooting workflow from loading film to the final frame. Metering Measure exposure in real-time using your iPhone camera. Spot metering reads any point precisely, while average metering balances the whole scene. Full control over aperture, shutter speed, and ISO. iPhone 16 users can meter and adjust EV directly with the Camera Control button. Ranging & Depth of Field Get accurate focus distance with LiDAR-enabled devices. The depth of field scale shows your sharp range and hyperfocal distance, supporting 35mm (full frame) and medium format calculations. Camera Management Create profiles for your cameras and lenses. Set focal length and aperture range for each lens, then link a camera when loading film — aperture selection is automatically constrained to your lens's actual range. Manage your digital film bag the way you manage your real gear. Film Roll Management Create a roll, select your film stock, start shooting. Push/pull processing support lets you set development stops and automatically converts to effective ISO. Each metering links to your current roll automatically. The frame counter tracks remaining shots. Mark rolls as in progress, finished, or developed. ND Filters Built-in support for ND2 through ND10000. Select a filter and exposure is compensated automatically — no manual stop conversion needed. Pair with the long exposure timer to master daytime slow shutter work. Reciprocity Compensation Film loses sensitivity during long exposures. FilmMeter includes reciprocity data for popular film stocks and calculates the corrected shutter time automatically. Long Exposure Timer Long-press the metering button to start a countdown. The timer integrates with Dynamic Island — visible even when locked. Get notified when your exposure completes. No more counting seconds for star trails or light painting. Smart Exposure Suggestions Built-in scene recognition analyzes your frame. In tricky lighting like snow, backlight, or night scenes, it tells you "add one stop" instead of leaving you to figure it out. Exposure Log Every metering saves full parameters and location. Export to CSV. Review your decisions, build your film notes. More Features • ND filter auto exposure compensation • Film LUT live preview • Aspect ratio overlays (135/120 formats) • Focal length frame lines (28-200mm) • Darkroom-friendly red-on-black interface • Metric and imperial units Free to Use • No subscription, no account required • Fully offline, no ads • English and Chinese Designed for film photography. Professional enough for experienced shooters, simple enough for beginners.

**Is your vintage camera's shutter still accurate — or has it drifted after decades of use?** ShuttR Check measures the real shutter speeds of your analog camera using your iPhone's camera and a light source. No hardware testers, no sensors to buy — reliably from 8s down to 1/500. The app has been used by photographers around the world on more than 100 different camera models, from SLRs to Rangefinders, Medium Format and Large Format Cameras. **HOW IT WORKS** Open your camera's film back, remove the lens, and put a light source behind it. ShuttR Check uses your iPhone's high-speed camera together with advanced image analysis to measure exactly how long each shutter release lets light through, then tells you how far that is from the speed you dialled in — in fractions of a stop. The app walks you through every step. There is nothing to configure, nothing to interpret: set up, release the shutter, read the result. **RELIABLE FROM 8s TO 1/500** ShuttR Check measures dependably from 8 seconds down to 1/500 — the range where mechanical shutters drift the most and where a deviation actually shows in your negatives. Faster speeds are deliberately left out: we'd rather not offer them than hand you numbers that look precise but aren't. Timed speeds slower than 1s are there too, for the cameras that offer them. **WHAT YOU GET** - A guided, step-by-step measurement protocol - Automatic calibration (checks your room is dark enough and free of flickering light, and warns you when your light source is too bright or not steady) - Every speed compared against its nominal value, with the deviation in stops and a clear OK / deviation / defective verdict - A capping check: shows how evenly the shutter exposes across the frame and flags capping, when the curtains fall out of sync at fast speeds - A history per camera, so you can track a shutter's condition over time - A shareable "shutter checked" certificate (image or PDF) — perfect for camera sellers on eBay, Etsy, or classifieds, showing buyers exactly what they're getting **SHUTTER TYPES** Horizontal and vertical focal-plane shutters are tested and validated — these are the shutters in most classic SLRs and rangefinders. Same goes for Leaf (central) shutters which have been tested on Large Format and Medium Format cameras. **WHAT THIS APP IS NOT** ShuttR Check gives you dependable, repeatable information about how far your shutter speeds have drifted. It does not replace a calibrated measuring instrument. **PRIVATE BY DESIGN** No accounts. No data collection. No internet connection required. Everything — your cameras, your measurements — stays on your device. **WHO IT'S FOR** - Film photographers who want to know if their gear is actually accurate - Camera collectors curious about a new find - Sellers who want to offer buyers real proof of a working shutter