# GlassMeter: Film Light Meter — Spot & Zone Exposure for Film > Simulates film exposure and development on iPhone. (iPhone/iPad app by Trond Wuellner.) - Source: https://appshunter.io/ios/app/glassmeter-film-light-meter/id6758900930 (this page in markdown: same URL + `.md`) - Developer: [Trond Wuellner](https://appshunter.io/developer/1865048148) - Category: Photo & Video, Utilities - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 6 MB - Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more - Released: 2026-10-27 - Data updated: 2026-10-31 - Monetization: free ## What is GlassMeter? GlassMeter shows you the photograph before you take it. Spot-meter any tone, place it on the Zone System, and watch your film — Portra, Tri-X, Velvia and 27 more — render live in the finder. Everything happens on your iPhone. THE METER • Spot, average and incident metering (incident uses the front camera) • Multi-spot Zone workflow: pin a shadow and a highlight, and GlassMeter places the exposure between them • Place your spot reading on Zone III, IV, V or VI, and hold it with AE-L • Scene Range marks the darkest and brightest parts of the frame and the stops between them, so you know whether the scene fits your film • An 11-zone histogram, exactly one stop per zone, with RGB curves on color film • LiDAR rangefinder on iPhones with LiDAR: subject distance and live depth-of-field limits for your aperture • Calibrate to your handheld meter in seconds THE FILM • 30 stocks modeled on manufacturer datasheets: Portra, Ektar, Gold, Ektachrome, Tri-X, T-MAX, HP5 Plus, FP4 Plus, Pan F Plus, Delta, XP2, Velvia, Provia, Acros II, CineStill, Double-X and more • Each with its own characteristic curve: Portra's long highlight shoulder, T-MAX's straight line, Velvia's deep shadows • Push and pull, with grain and contrast that shift as they do in the darkroom • Reciprocity failure for every stock, from the published correction data • Halation true to the film: CineStill blooms, black-and-white barely glows THE CAMERA • Aperture and shutter dials with haptic detents. Lock one, and METER solves the other • 15 classic medium-format lens profiles from the Zeiss V-system, each with its true field of view and vignetting • Contrast filters (Y8, G11, O21, R25), color conversion filters and a full ND set to ND1000, each with its exposure factor • Bulb mode: a metered long exposure, corrected for reciprocity, with a countdown timer THE FRAMES • Every frame is developed by the same 16-bit wide-gamut film pipeline as the finder, so the look you composed is the image you keep • A notebook that keeps itself: each frame records its film, lens, aperture, shutter, ISO, push/pull and spot readings • Contact sheet and negative views: color negatives with their orange mask, black-and-white on a clear base • Share the photo, or a film-frame card with edge markings and the exposure • EXIF records the body, lens, film, aperture and shutter you used • Save to Photos and location tagging are optional and off by default PRIVATE BY DESIGN No account. No analytics. No AI. GlassMeter runs entirely on your iPhone and collects no data; its App Privacy label reads "Data Not Collected." Photos and location access are optional, and your frames stay yours. GlassMeter is an independent app, not affiliated with any camera or film manufacturer. All trademarks belong to their respective owners. ## Key features - Spot, average, and incident metering - Multi-spot Zone System workflow - 30+ film stock simulations with characteristic curves - Reciprocity failure and halation simulation - Lens profiles with field of view and vignetting - Contrast and color filter simulation - Bulb mode with reciprocity correction ## Is GlassMeter safe? Not enough ratings yet to assess GlassMeter. ## Is GlassMeter legit? GlassMeter: Film Light Meter has limited verification signals. The AppsHunter Legitimacy Score for GlassMeter is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Frequently asked questions about GlassMeter ### What is GlassMeter? GlassMeter is a mobile application designed to simulate the process of film photography. It allows users to meter light, select film stocks, and adjust camera settings to preview the final image before taking a photograph. ### How does GlassMeter simulate film stocks? GlassMeter models over 30 film stocks based on manufacturer datasheets, replicating their unique characteristic curves, push/pull effects, reciprocity failure, and halation. This provides a realistic preview of how each film will render an image. ### Can GlassMeter help with the Zone System? Yes, GlassMeter supports a multi-spot Zone workflow. You can pin a shadow and a highlight, and the app will place the exposure between them, allowing you to assign readings to specific zones like III, IV, V, or VI. ### Does GlassMeter have ads? No, GlassMeter does not contain advertisements. It is a completely free application with no ads or in-app purchases. ### What devices does GlassMeter support? GlassMeter is currently supported on iPhones. It utilizes features like the front camera for incident metering and the LiDAR rangefinder on compatible iPhone models. ### How often is GlassMeter updated? GlassMeter was last updated on October 27, 2026, with version 1.0.0. As an independent app, update frequency may vary based on developer releases. ### Is GlassMeter private? Yes, GlassMeter is designed with privacy in mind. It runs entirely on your iPhone, collects no data, and does not require an account or analytics. Your photos and location access are optional. ### What is the rating for GlassMeter? GlassMeter has a perfect rating of 5.0 stars based on 2 user ratings, indicating a highly positive user reception. ## Version history (last 1 release) ### 1.0.0 — 2026-10-27 No release notes. ## Related topics [light meter free film](https://appshunter.io/ios/topics/light-meter-free-film) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*