# GrayZone - Light Meter — Zone System Spot Light Meter > Digital spot meter for precise exposure control in photography. (iPhone/iPad app by Massimiliano Schenetti.) - Source: https://appshunter.io/ios/app/grayzone-light-meter/id6757147623 (this page in markdown: same URL + `.md`) - Developer: [Massimiliano Schenetti](https://appshunter.io/developer/1864870280) - Category: Photo & Video, Utilities - Price: $2.99 - Rating: 2.30/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 3 MB - Languages: American English - Released: 2026-01-06 - Data updated: 2026-08-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/grayzone-light-meter/id6757147623/reviews.md ## What is GrayZone? GrayZone reads light where you decide — not where your camera guesses. Built by Max of max&douglas — professional photographer with 25 years in editorial and advertising photography. Zone System Mode Measure a reference area first (Zone V), then check where the other tones will fall and their relative EV difference, for precise and consistent exposure. Real SPOT Metering Reads light exclusively in the area you select. Ideal for portraits, complex lighting and critical situations. Calibrated to render the selected area as neutral gray. Direct Exposure Control Set ISO before metering, like a dedicated light meter. Instant precise combinations of shutter speed and aperture. Exposure lock with AE LOCK. Half-stop support for finer control. MANUAL mode with over/underexposure scale. Essential Interface Live preview in your sensor's native ratio. NEW UI color inversion Shows only what you need. Nothing else. Complete Privacy No ads. No photos saved. No data collected or transmitted. For manual shooters — on film or digital. It does not replace your camera. It works alongside it. ## Key features - Zone System Mode for tonal analysis - Real SPOT metering for selected areas - Direct exposure control with ISO, shutter speed, and aperture - Live preview with native sensor ratio - UI color inversion option - No ads or data collection ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/grayzone-light-meter/id6757147623/reviews.md ### 1/5 — Not really the “Zone System” *2026-07-23* Maybe this app can be more useful with future revisions. For now it seems the most value is for determining the number of stops between dark and light to stay within the dynamic range of your selected film. To use the zone system effectively one needs to be able to measure the value (EV) of the brightest highlight, or the darkest shadow where details are to be retained, and to place that on a desired zone (e.g. zone VII/VIII for highlights, or zone VII/VIII for shadows). Then with your ISO set, use the corresponding shutter speed and aperture associated with the selected zone. This app just makes whatever you measure zone V and subsequent measurements are based off of that. That means that in order to effectively place everything in the scene in the proper zone you would have to always point the spot meter at something that’s actually neutral gray (zone V). Without the ability to read EV, place it on the desired zone and then select your desired shutter speed and aperture combination, this app has little value. **Developer response:** Thank you for your thoughtful feedback. I think the key difference is that GrayZone was never intended to replicate the whole workflow of Ansel Adams. It was designed as a simplified introduction to zone-based metering, making the Zone System easier to understand and apply without requiring users to work directly with EV values and manual zone placement. If you’re looking for the complete traditional workflow (reading EV, assigning zones, and calculating exposure from those values) then you’re describing a different type of application. That certainly has value, but it goes beyond the scope and philosophy of GrayZone. I do appreciate your suggestion, though, and I’ll keep it in mind as the app evolves. ### 1/5 — No placement of reference reading. *2026-07-21* I don’t get it, for zone system controls one needs to read an important shadow and then place it on the zone scale. For this example point at a shadow which becomes the reference or zone V. Unless I am missing something I can’t find a way to place the reference reading at say zone III. Without being able to place a shadow reading at say zone III then any other readings are useless. Correct me if I am wrong. With a spot meter I point at an important shadow, place that shadow, say zone III, then read the highlights. With the shadow placed at zone III then the highlight reading will fall at say zone VIII. With that N-1 processing would be needed. Can the reference reading be placed at say zone III? If not what is the point. **Developer response:** Thanks for your detailed feedback. You are correct about the traditional Zone System workflow: a shadow value is normally measured and placed on a chosen zone (for example Zone III), then highlights are evaluated from that placement. GrayZone, however, was designed with a slightly different approach, simplified: the first reading establishes a reference point (Zone V), and subsequent readings show their relative position on the scale. The goal is to quickly visualize tonal relationships rather than replace the complete Adams workflow. This doesn’t mean the method is incorrect: it is simply based on a different starting point. I understand that for photographers following the classic Zone System, the ability to assign the first reading to a specific zone would make the app more flexible, and I will consider adding this in a future update. Since your review is based on the assumption that the app should work differently, I would appreciate it if you could reconsider the rating in light of how the feature is intended to work. Thank you again for taking the time to share such thoughtful feedback and if you want, write to the support email for further details. ### 4/5 — Support for 1/3-stop increments and EV display is essential! *2026-07-20* It would be great if you could also add an option to display aperture values in 1/3-stop increments. Many large format lenses can only be adjusted in 1/3-stop increments, so this would make the app much more practical for large-format photographers. It would also be very helpful if the app could display EV (Exposure Value) as well. **Developer response:** Thanks for the suggestion! EV display is already on my feature list, and I’ll also consider adding 1/3-stop aperture increments for large format photographers. I appreciate the feedback. ### 5/5 — Brilliant software *2026-06-21* Spot metering is such a great idea, but then combining it with the zone system is absolutely brilliant. You still have to learn about the zone system and what it does, but this little piece of software makes it really easy to see how much contrast is in your scene and what you might need to do in development. I also really appreciate it’s a buy once situation, instead of another damn subscription. Also that there’s zero privacy infringement. Well done! **Developer response:** Hi! Thank you very much for your review, very appreciated. I’m happy you found it useful: this is a first small step for a more thoughtful and methodical approach to photography. ### 5/5 — Perfect! *2026-02-21* This app is a perfect addition for anyone who wants to improve their photos. **Developer response:** Thank you! Happy to be useful to improve your images. Spread the word ;) ## Frequently asked questions about GrayZone ### What is GrayZone's primary function? GrayZone functions as a digital spot meter for photographers. It allows you to measure light in a specific area you select, rather than relying on your camera's general metering, for more precise exposure control. ### How does GrayZone's Zone System Mode work? In Zone System Mode, you first measure a reference area (typically Zone V). Then, you can check other areas to see where their tones will fall and their relative EV difference, enabling consistent exposure and tonal mapping. ### Does GrayZone save or collect user photos or data? No, GrayZone prioritizes user privacy. It does not save any photos, collect any data, or transmit any information, and it contains no advertisements. ### What devices is GrayZone compatible with? GrayZone is currently supported on iPhone devices. It is designed to work alongside your camera, not replace it. ### What is the price of GrayZone? GrayZone is a paid application, available for a one-time purchase of $2.99. There are no in-app purchases or subscriptions. ### How often is GrayZone updated? The latest version of GrayZone is 3.2, and it was last updated on June 20, 2026. This indicates a recent update, suggesting ongoing support and development. ### What is the age rating for GrayZone? GrayZone has an age rating of 4+, making it suitable for a wide range of users. This rating is based on general content appropriateness. ### Can GrayZone be used for both film and digital photography? Yes, GrayZone is designed for manual shooters using either film or digital cameras. Its precise metering capabilities are beneficial for achieving accurate exposures in both mediums. ## Version history (last 5 releases) ### 3.2 — 2026-06-20 New inverted UI color scheme Histogram repositioned to avoid interfering with the rest of the interface ### 3.1 — 2026-04-27 Clearer explanations of the Zone System workflow for a more intuitive experience. Added a direct “Rate This App” option inside the app. Minor improvements and general refinements. ### 3.0.1 — 2026-04-20 Beschreibung jetzt in mehreren Sprachen verfügbar ### 3.0 — 2026-04-02 ・Nuova modalità Sistema Zonale per un controllo ancora più preciso della luce ・Interfaccia completamente rivista ・Miglioramenti e correzioni ### 2.9 — 2026-03-05 • New Lock Screen WIDGET: launch the light meter with one tap • New app icon • Refined interface graphics • General improvements and optimizations --- *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 2026-08-24.*