# Light Meter LuMe — Film Light Meter & Calculators > Pro-grade light meter and exposure calculator for film photographers. (iPhone/iPad app by Contrast Studio.) - Source: https://appshunter.io/ios/app/light-meter-lume/id6772063294 (this page in markdown: same URL + `.md`) - Developer: [Contrast Studio](https://appshunter.io/developer/6772063296) - Category: Photo & Video, Utilities - Price: Free with in-app purchases - Rating: 4.90/5 from 17 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 16 MB - Languages: American English, Arabic, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Polish, Brazilian Portuguese and 6 more - Released: 2026-05-27 - Data updated: 2026-08-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/light-meter-lume/id6772063294/reviews.md ## What is Light Meter LuMe? LuMe is a pro-grade light meter and exposure calculator built for film photographers. Whether you're shooting medium format on a Mamiya, large format on a 4×5, or 35mm on a Leica, LuMe gives you the exposure intelligence your film camera doesn't have. METERING MODES FOR EVERY SITUATION • Matrix — averages the whole scene for balanced exposures • Center-weighted — emphasizes the middle, like a classic SLR meter • Spot — measures a small area you tap, just like a 1° spot meter • Zone System — Ansel Adams' tonal mapping (Zones I–IX) right in your viewfinder MULTI-POINT SPOT METERING Place up to four spot markers anywhere on your scene. Read each EV at a glance, evaluate contrast range, and place tones with intention. LIDAR SPOT DISTANCE (on Pro devices) See the physical distance to any metered spot — useful for hyperfocal setup and verifying focus on rangefinders and manual-focus lenses. RECIPROCITY CORRECTION FOR EVERY FILM STOCK Long exposures don't behave linearly on film. LuMe applies the Schwarzschild exponent for your stock — Tri-X, TMax, Portra, Ektar, Velvia, and more — so you don't need printed tables in your bag. DEPTH OF FIELD CALCULATOR Hyperfocal distance, near limit, far limit — for 35mm, APS-C, medium format (6×4.5, 6×6, 6×7), and large format (4×5). One tap. FLASH GUIDE NUMBER CALCULATOR GN, distance, power fraction → f-stop. Solved. LIVE EXPOSURE TOOLS • Histogram overlay • Highlight/shadow clipping warnings • ND filter compensation • Aperture priority & shutter priority • Exposure compensation dial • ISO and shutter range constraints (cap at your film speed) BUILT FOR THE WAY FILM PHOTOGRAPHERS ACTUALLY SHOOT • Spot meter a high-contrast scene; place highlights on Zone VII • Apply reciprocity for a 30-second exposure on Tri-X • Calculate hyperfocal for landscape work on Portra 400 • Verify a flash setup before burning a frame LuMe replaces your handheld meter, reciprocity card, DoF chart, and flash calculator with one tool that fits in your camera bag. Available in 16 languages: English, German, French, Spanish, Italian, Portuguese, Dutch, Swedish, Polish, Turkish, Russian, Arabic, Japanese, Korean, Chinese (Simplified & Traditional). LUME PRO • $6.99 USD for lifetime access Privacy policy: https://lume.contraststudio.app/privacy.html Terms of Use: https://lume.contraststudio.app/terms.html ## Key features - Multiple metering modes (Matrix, Center-weighted, Spot, Zone System) - Multi-point spot metering with contrast evaluation - Reciprocity correction for various film stocks - Depth of field and hyperfocal distance calculator - Flash guide number calculator - Live exposure tools including histogram and clipping warnings ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | LuMe Pro Lifetime | $6.99 | one-time | | LuMe Pro Lifetime | $6.99 | one-time | ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/light-meter-lume/id6772063294/reviews.md ### 5/5 — Simple and clean *2026-07-05* The app made my life easier st work! So easy to spot and tune my camera ### 5/5 — Nice app. *2026-06-26* Love the app and its so easy to use. ### 5/5 — Great app *2026-06-22* Great app. Helps a lot to get better photos. ### 5/5 — Simple Easy Beautiful *2026-06-15* Finally an app feels like made buy a photographer! simple to use, and UI is very intuitive, I really like the on screen viewfinder which makes shooting in darknight way more eaiser! ### 5/5 — Best app *2026-06-12* I’ve been using this as my main driver for a few days now and love it! Excited for new features! ### 5/5 — Very useful *2026-06-11* The multi-point spot metering is actually really useful. Being able to tap a few spots on the screen to check the contrast range gives me peace of mind when shooting film. I can finally leave my bulky hardware meter at home. ### 5/5 — Simple and clean *2026-06-11* The app made my life easier st work! So easy to spot and adjust my camera for every new angles ### 5/5 — The only light meter app you need *2026-05-31* Accurate measuring. Clean UI. Feature packed. The flash measure is especially useful and save my day. ### 5/5 — The best light meter app *2026-05-30* I love how quick and easy it is to spot and zone meter. For spot I can add points instantly by tapping around the screen and then lock the positioning, and for zone I can move the shadow, mid, and high points step by step to see the effect on the final photo. I’ve never been able to do complex metering this fast before, but matrix and center metering still stays simple to use and read. ### 5/5 — Best In Class *2026-05-29* I stumbled across this app on the App Store completely by accident. Looks like it’s new? I’m basically an advanced amateur photographer, this has completely replaced my light meter and the other app I used to use. ## Frequently asked questions about Light Meter LuMe ### What is Light Meter LuMe? Light Meter LuMe is a professional-grade light meter and exposure calculator designed specifically for film photographers. It helps you achieve accurate exposures by providing advanced metering modes and film-specific corrections. ### Does Light Meter LuMe have ads? No, Light Meter LuMe does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features. ### What metering modes does Light Meter LuMe offer? Light Meter LuMe provides several metering modes: Matrix for averaging the whole scene, Center-weighted to emphasize the middle, Spot for measuring small areas, and Zone System for tonal mapping. ### How does Light Meter LuMe handle long exposures for film? LuMe features reciprocity correction for various film stocks, applying the Schwarzschild exponent to account for non-linear behavior during long exposures. This eliminates the need for printed reciprocity tables. ### What is the pricing for Light Meter LuMe Pro? Light Meter LuMe Pro offers lifetime access for a one-time purchase of $6.99 USD. This unlocks all professional-grade features for continuous use. ### What devices is Light Meter LuMe compatible with? Light Meter LuMe is currently available for iPhone devices. Future compatibility with other platforms may be considered based on user demand. ### How often is Light Meter LuMe updated? The app was last updated on June 19, 2026, indicating active development and support. Users can expect ongoing improvements and bug fixes. ### What age rating does Light Meter LuMe have? Light Meter LuMe has an age rating of 4+, making it suitable for a wide range of users. This rating suggests no mature content is present within the application. ## Version history (last 5 releases) ### 1.10 — 2026-08-04 • New Home Screen widget: see your last reading at a glance. • Quick Access: open LuMe and start metering from Control Center, the Lock Screen, the Action button, or Siri. ### 1.9 — 2026-07-14 New: a highlight & shadow difference reading in the viewfinder — see at a glance how many stops your highlights and shadows fall from the metered midtone, a quick contrast check while you meter. Plus refinements and fixes. ### 1.8 — 2026-07-13 New: Incident metering. Lay a small piece of white paper over the front camera and measure the light falling on your subject — like a handheld incident meter. Great for portraits and studio work. Plus refinements and fixes. ### 1.7 — 2026-07-02 Minor bug fixes and optimizations. ### 1.6 — 2026-07-01 Minor bug fixes and optimizations. ## More apps by Contrast Studio - [Flog Film Logbook](https://appshunter.io/ios/app/flog-film-logbook/id6776744262) - [Handsfree Voice Coding](https://appshunter.io/ios/app/handsfree-voice-coding/id6781863812) All apps by Contrast Studio: https://appshunter.io/developer/6772063296 ## Related topics [lume](https://appshunter.io/ios/topics/lume) · [posemetric](https://appshunter.io/ios/topics/posemetric) --- *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 2026-08-08.*