GrayZone - Light Meter

Name: GrayZone - Light Meter
Price: 2.99 USD
Rating: 2.3 (3 reviews)
Author: Massimiliano Schenetti

by Massimiliano Schenetti

iPhone

Active Last checked 31 Jul 2026

App Store ↗

Quick verdict

What it is: Store information collected; independent summary not yet available.
At a glance: $2.99

Categories and search queries

Official categories

Photo & Video
Utilities

AppCorpus categories

Key functions

Function	Availability	Access	Scope	Evidence
Family Sharing	Yes	Unknown	App Store	Store published

Screens

No screenshots collected yet.

Pricing & paywalls

App Store

Price: $2.99

Last verified 31 Jul 2026

Ratings & reviews

App Store

2.3 3 ratings · App Store

5/5Brilliant software
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!

MichaelMoore · 31 Jul 2026
1/5No placement of reference reading.
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.

Deardorff 8x10 · 31 Jul 2026
1/5Not really the “Zone System”
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.

Fuji_Kon · 31 Jul 2026

Privacy & accessibility

App Store

Privacy

Data Not Collected Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

1.0
1.01
Updated App Store listing text and localizations.
2.0
• Completely redesigned app • New user interface • Manual Mode selection: you now have full control over shutter speed, with a visual scale showing how far the selected exposure deviates from optimal middle gray, for total control • Improved exposure calculation formula
2.1
UI improvements
2.2
ISO, shutter speed, and aperture values are now much easier to select, using a more intuitive and native iOS interaction. I constantly update GrayZone Meter to improve the user experience and to respond to your feedback. For any request, issue, or even just to leave a compliment, please use the support form. If you enjoy the app, don’t forget to leave a rating on the App Store.
2.5
• Interface improvements and refinements for a smoother and more consistent user experience • Introduction of a histogram to support exposure reading • Extension of the available ISO, aperture, and shutter speed values • Alerts when minimum and maximum values are reached
2.6
• Welcome to the world of GrayZone: black-and-white visualization, free from distractions (with a switch) • Bug fixes • Interface improvements and refinements for a smoother and more consistent user experience • Introduction of a histogram to support exposure reading • Extension of the available ISO, aperture, and shutter speed values • Alerts when minimum and maximum values are reached
2.7
Visual and interaction refinements
2.8
• Adjustable spot diameter for more precise metering • Under-the-hood improvements and code cleanup • Visual and interaction refinements
2.8.1
Text and metadata improvements for a better user experience.
2.8.5
*UI improvements *New support webpage
2.9
• New Lock Screen WIDGET: launch the light meter with one tap • New app icon • Refined interface graphics • General improvements and optimizations
3.0
・New Zone System mode for even more precise light control ・Completely redesigned interface ・Performance improvements and bug fixes
3.0.1
Descriptions now available in multiple languages
3.1
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.
3.2 · 20 Jun 2026
New inverted UI color scheme Histogram repositioned to avoid interfering with the rest of the interface

Show more Show less

Alternatives

Film Photography Viewfinder — Same category + similar ratings
Focusing Loupe — Same category + similar ratings

Availability by market

Data quality & evidence

Page completeness: Live store listing
Last verified: 31 Jul 2026
Sources: App Store

Independent summary has not been published yet.
Screenshots: not yet collected

Report a correction

Use this page with an AI agent

AppCorpus MCP gives your agent current app data, prices, screens, features and sources.

Example prompt

Compare GrayZone - Light Meter with Film Photography Viewfinder.

View JSON

GET /api/v3/apps/6757147623

{
  "app_id": 6757147623,
  "canonical_url": "https://appcorpus.com/apps/grayzone-light-meter-6757147623",
  "identity": {
    "name": "GrayZone - Light Meter",
    "slug": "grayzone-light-meter",
    "developer": {
      "name": "Massimiliano Schenetti",
      "url": "https://appcorpus.com/developers/massimiliano-schenetti-developer_da230dd11746bfe9e654ea0b8a9fda93"
    },
    "icon_url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/d4/b7/85/d4b785fc-cdc9-62fa-82ea-e920087ec656/AppIcon-0-0-1x_U007ephone-0-1-85-220.png/512x512bb.jpg",
    "stores": [
      "apple"
    ],
    "platforms": [
      "iphone"
    ],
    "status": {
      "state": "active",
      "label": "Active",
      "last_checked": "2026-07-31",
      "last_checked_label": "31 Jul 2026",
      "banner": null,
      "region_note": null
    }
  },
  "listings": [
    {
      "store": "apple",
      "status": "ACTIVE",
      "url": "https://apps.apple.com/us/app/grayzone-light-meter/id6757147623?uo=4",
      "rating": 2.3,
      "rating_count": 3,
      "formatted_price": "$2.99",
      "is_free": false,
      "has_iap": false,
      "has_subscription": false,
      "version": "3.2",
      "updated": "2026-06-20",
      "currency": "USD"
    }
  ],
  "summary": {
    "one_liner": null,
    "summary": null,
    "best_for": [],
    "not_for": [],
    "status": "fallback",
    "at_a_glance": [
      "$2.99"
    ]
  },
  "categories": {
    "official": [
      "Photo & Video",
      "Utilities"
    ],
    "appcorpus": [
      {
        "category_id": "photo-video",
        "label": "Photo & video",
        "url": "https://appcorpus.com/categories/photo-video"
      },
      {
        "category_id": "utilities",
        "label": "Utilities",
        "url": "https://appcorpus.com/categories/utilities"
      }
    ]
  },
  "use_cases": [],
  "features": [
    {
      "capability_id": "family_sharing",
      "label": "Family Sharing",
      "availability": "yes",
      "access_level": "unknown",
      "scope": "App Store",
      "evidence": "Store published"
    }
  ],
  "pricing": [
    {
      "store": "apple",
      "formatted_price": "$2.99",
      "is_free": false,
      "has_iap": false,
      "has_subscription": false,
      "currency": "USD",
      "market": "us",
      "last_verified": "2026-07-31",
      "rows": [
        "Price: $2.99"
      ]
    }
  ],
  "screens": [],
  "ratings": [
    {
      "store": "apple",
      "average": 2.3,
      "count": 3,
      "market": "us",
      "observed_at": "2026-07-31",
      "reviews": [
        {
          "rating": 5,
          "title": "Brilliant software",
          "body": "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!",
          "author": "MichaelMoore",
          "date": "31 Jul 2026"
        },
        {
          "rating": 1,
          "title": "No placement of reference reading.",
          "body": "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.",
          "author": "Deardorff 8x10",
          "date": "31 Jul 2026"
        },
        {
          "rating": 1,
          "title": "Not really the “Zone System”",
          "body": "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.",
          "author": "Fuji_Kon",
          "date": "31 Jul 2026"
        }
      ]
    }
  ],
  "privacy": [
    {
      "store": "apple",
      "declarations": [
        {
          "title": "Data Not Collected",
          "detail": "",
          "source": "Developer declared"
        }
      ],
      "accessibility": []
    }
  ],
  "changes": [
    {
      "store": "apple",
      "version": "1.0",
      "released_at": null,
      "notes": ""
    },
    {
      "store": "apple",
      "version": "1.01",
      "released_at": null,
      "notes": "Updated App Store listing text and localizations."
    },
    {
      "store": "apple",
      "version": "2.0",
      "released_at": null,
      "notes": "• Completely redesigned app • New user interface • Manual Mode selection: you now have full control over shutter speed, with a visual scale showing how far the selected exposure deviates from optimal middle gray, for total control • Improved exposure calculation formula"
    },
    {
      "store": "apple",
      "version": "2.1",
      "released_at": null,
      "notes": "UI improvements"
    },
    {
      "store": "apple",
      "version": "2.2",
      "released_at": null,
      "notes": "ISO, shutter speed, and aperture values are now much easier to select, using a more intuitive and native iOS interaction. I constantly update GrayZone Meter to improve the user experience and to respond to your feedback. For any request, issue, or even just to leave a compliment, please use the support form. If you enjoy the app, don’t forget to leave a rating on the App Store."
    },
    {
      "store": "apple",
      "version": "2.5",
      "released_at": null,
      "notes": "• Interface improvements and refinements for a smoother and more consistent user experience • Introduction of a histogram to support exposure reading • Extension of the available ISO, aperture, and shutter speed values • Alerts when minimum and maximum values are reached"
    },
    {
      "store": "apple",
      "version": "2.6",
      "released_at": null,
      "notes": "• Welcome to the world of GrayZone: black-and-white visualization, free from distractions (with a switch) • Bug fixes • Interface improvements and refinements for a smoother and more consistent user experience • Introduction of a histogram to support exposure reading • Extension of the available ISO, aperture, and shutter speed values • Alerts when minimum and maximum values are reached"
    },
    {
      "store": "apple",
      "version": "2.7",
      "released_at": null,
      "notes": "Visual and interaction refinements"
    },
    {
      "store": "apple",
      "version": "2.8",
      "released_at": null,
      "notes": "• Adjustable spot diameter for more precise metering • Under-the-hood improvements and code cleanup • Visual and interaction refinements"
    },
    {
      "store": "apple",
      "version": "2.8.1",
      "released_at": null,
      "notes": "Text and metadata improvements for a better user experience."
    },
    {
      "store": "apple",
      "version": "2.8.5",
      "released_at": null,
      "notes": "*UI improvements *New support webpage"
    },
    {
      "store": "apple",
      "version": "2.9",
      "released_at": null,
      "notes": "• New Lock Screen WIDGET: launch the light meter with one tap • New app icon • Refined interface graphics • General improvements and optimizations"
    },
    {
      "store": "apple",
      "version": "3.0",
      "released_at": null,
      "notes": "・New Zone System mode for even more precise light control ・Completely redesigned interface ・Performance improvements and bug fixes"
    },
    {
      "store": "apple",
      "version": "3.0.1",
      "released_at": null,
      "notes": "Descriptions now available in multiple languages"
    },
    {
      "store": "apple",
      "version": "3.1",
      "released_at": null,
      "notes": "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."
    },
    {
      "store": "apple",
      "version": "3.2",
      "released_at": "2026-06-20",
      "notes": "New inverted UI color scheme Histogram repositioned to avoid interfering with the rest of the interface"
    }
  ],
  "alternatives": [
    {
      "app_id": 6741761447,
      "name": "Film Photography Viewfinder",
      "url": "https://appcorpus.com/apps/film-photography-viewfinder-6741761447",
      "reason": "Same category + similar ratings"
    },
    {
      "app_id": 6714448525,
      "name": "Focusing Loupe",
      "url": "https://appcorpus.com/apps/focusing-loupe-6714448525",
      "reason": "Same category + similar ratings"
    }
  ],
  "evidence_summary": {
    "index_state": "S1",
    "evidence_level": 1,
    "level_label": "Live store listing",
    "indexable": true,
    "last_verified_at": "2026-07-31",
    "unknown_fields": [
      "Independent summary has not been published yet.",
      "Screenshots: not yet collected"
    ],
    "sources": [
      "App Store"
    ]
  },
  "availability_markets": {
    "live": [
      "us"
    ],
    "selected": "us",
    "note": null
  },
  "feature_events": {
    "events": []
  },
  "features_slice": {
    "plans": [],
    "features": [],
    "unknown_features": [
      "family_sharing"
    ],
    "data_cutoff": "31 Jul 2026"
  }
}