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SlowLightMeter

App Store★ 5.0FreeFirst seen 21 Oct 2026

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App info

Category: Photo & Video
Age rating: 4+
Price: Free
Version: 3.0
Released: Sep 4, 2025
Last updated: 12 Apr 2026
Size: 1.5 MB
Requires: iOS 15.6 or later
Languages: 1

5.06 ratings

★★★★★

Average rating on the App Store. Apple doesn't publish how many ratings each star has.

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What's newin version 3.0

-Long Exposure mode: calculates film reciprocity failure compensations and ND filter multipliers automatically -Video view -Simplified UI

About this app

Read full description

As a film photographer, I wanted an accurate yet simple reflective and incident light meter. After trying several, I decided to build my own. This light meter continuously measures light, so it requires minimal interaction during a shoot. To avoid accidentally changing film ISO, I added an ISO lock. And since I shoot often with my Hasselblad, I made EV values a core feature of the app.