This app assists film photographers with accurate long-exposure calculations. It uses your device's camera to read exposure data, then provides shutter speed recommendations with reciprocity correction based on film stock and aperture. It offers official manufacturer data, community guidance, and experimental estimates.
1.0.6
October 16, 2026
Guided camera calibration, remembered meter inputs, and protection for unsaved exposure notes. Improved camera recovery and larger-text layouts make shooting easier.
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ReciproMeter is a light meter application designed for film photographers. It helps calculate accurate shutter speeds for long exposures by applying reciprocity correction based on film stock and aperture settings.
ReciproMeter uses official manufacturer data for reciprocity correction whenever available. For films where this data is limited, it also offers optional community-sourced guidance and experimental estimates, clearly labeled by confidence level.
Key features include live camera metering with full-screen exposure view, exposure lock, a built-in film library with official reciprocity sources, and a bulb timer for corrected long exposures. It also supports dark mode, light mode, or system appearance.
Yes, ReciproMeter is free to download and use. All core metering and film features are available without charge. An optional one-time in-app purchase is available to remove all advertisements permanently.
ReciproMeter contains advertisements. Users can remove all ads permanently with a one-time in-app purchase, offering an ad-free experience without any subscription or expiration.
ReciproMeter is currently supported on iPhones. It is rated for ages 4 and up.
The latest version of ReciproMeter is 1.0.3, which was last updated on September 15, 2026. The app was initially released on April 15, 2026.
ReciproMeter has a rating of 3.0 stars based on 1 rating. This indicates a mixed user reception at this time.
