AppCorpus
Market US

Zone System

by Davin Nguyen

iPhone · iPad

Active Last checked 31 Jul 2026

Quick verdict

What it is
Store information collected; independent summary not yet available.
At a glance
  • $1.99

Categories and search queries

Official categories

AppCorpus categories

Key functions

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

Screens

App Store

21 store screenshots

Zone System ipad screenshot 1
Zone System ipad screenshot 2
Zone System ipad screenshot 3
Zone System ipad screenshot 4

Pricing & paywalls

App Store

  • Price: $1.99

Ratings & reviews

App Store

5.0 3 ratings · App Store

  1. 5/510/10

    it’s awesomesauce!!!!

    -r! · 31 Jul 2026

Privacy & accessibility

App Store

Privacy

  • Data Not Collected Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

  • 1.0
  • 1.1

    • New Calculate Zone Tool: In addition to the calculate stop feature, you can now use the calculate zone tool to instantly compute the correct exposure zone. • Enhanced Display Modes: Improved tenths and rounded display modes for f-stop and t-stop calculations. Now you can switch between exact, rounded, or tenths values with greater clarity, tailored to precision needs.

  • 2.0

    • Exposure Records: Save your exposure configurations and load them later for quick access. • Rounded Mode Adjustment: Instead of rounding up (e.g., turning 5.65 into 5.7), extra digits are dropped to show standard f-stop/T-stop values (e.g., 5.65 becomes 5.6). • Tenths Function Improvement: Now displays 0 when empty.

  • 2.1

    • Color Preview: Replace the traditional black and white scale with color to preview how exposure zones will look when developed.

  • 2.2

    • N Development: Supports both contracted and expanded development in the Zone system. • Highlight & Shadow: A new tab allows you to use highlight and shadow exposure to determine suggested N development and exposure. • Bug Fixes

  • 2.2.1

    • Bug fixes

  • 2.3

    • Simplified experience • Bug fixes

  • 2.4

    • Now on Apple Watch

  • 2.4.1

    • Now on Apple Watch • Bug fixes

  • 2.5

    • Added shutter speed, ISO, and EV calculations

  • 2.5.1

    • Bug fixes

  • 2.5.2

    • Added shutter speed, ISO, and EV calculations • Added Share Feedback option to report errors and to request features

  • 2.5.3 · 5 Feb 2026

    Performance improvements

Alternatives

Availability by market

Data quality & evidence

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

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