CalcuLight
Intuitive Light Meter App
About
This app provides advanced light metering for film photographers, offering multiple metering modes and exposure control options. It helps users achieve precise exposures for their shots, with features like Zone System display and a log book for tracking. A free version is available, with an optional Pro upgrade for more advanced tools.
What's New in CalcuLight
1.2.0
August 1, 2026
New Exposure Combination Scale Display! The main readout now shows a scale of equivalent exposures instead of a single pair. Your current setting sits in the middle, underlined, with nearby combinations on either side so you can see at a glance that 1/125 at f/5.6 gives the same exposure as 1/250 at f/4. • Swipe across the values to scroll through combinations • Tap any combination to jump straight to it • Combinations your camera can't reach are flagged • Computed values now follow your own stop increment: a full-stop aperture setting gives full-stop apertures, even with the shutter set to ⅓ stop • More reliable Remember Settings restore when the app launches • Improved metering speed and smoother dial control • Layout fix for the bottom controls on smaller screens • Improved low-light accuracy • cd/m² readings have been corrected to the ISO 2720 standard.
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CalcuLight
A Powerful & Intuitive Light Meter For Film Photography
In-App Purchases
$14.99
CalcuLight
A Powerful & Intuitive Light Meter For Film Photography
FAQ
What metering modes does CalcuLight offer?
CalcuLight offers Center Weighted and 3D Matrix metering in the free version. The Pro version adds Spot metering for precise measurement and Calculated metering for averaging multiple points, ideal for high contrast scenes and Zone System workflows.
Can CalcuLight help with the Zone System?
Yes, the Pro version of CalcuLight includes a Zone System value display overlay. In Calculated metering mode, each metering point shows its own zone value, providing advanced exposure control for Zone System users.
What are the exposure control options in CalcuLight?
CalcuLight provides Shutter Priority metering where it calculates aperture. The Pro version also includes Aperture Priority metering, allowing you to set aperture and calculate shutter speed. EV compensation is available for per-shot adjustments.
Does CalcuLight have a log book?
The Pro version of CalcuLight features a comprehensive log book. It saves every reading with exposure data, metering mode, GPS location, and timestamp. You can also export your shooting log as CSV or JSON.
How much does CalcuLight Pro cost?
You can try the Pro version for free for 14 days. After the trial, you can choose a monthly subscription for $0.99 USD or a lifetime access purchase for $14.99 USD to unlock all Pro features.
Is CalcuLight available on Android?
CalcuLight is currently available for iOS devices, including iPhone, iPad, and iPod. The app supports both portrait and landscape orientations.
How often is CalcuLight updated?
The latest version of CalcuLight is 1.2.0, last updated on August 1, 2026. The app is actively maintained, with new features and improvements likely to be released regularly.
What is the age rating for CalcuLight?
CalcuLight has an age rating of 4+. This indicates that the app is suitable for users of all ages and does not contain mature content.
