# Light Ruler: Photo Toolkit

> ND, DoF, Night Sky Calculator

Canonical page: [https://chrome-stats.com/d/id6779471175](https://chrome-stats.com/d/id6779471175)

## Overview

- **ID:** `id6779471175`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 小倩 徐
- **Category:** Utilities
- **Version:** 3.0.3
- **Last updated:** 2026-09-06
- **First published:** 2026-06-18
- **Size:** 1.12 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/light-ruler-photo-toolkit/id6779471175)
- **Privacy policy:** [https://davidzyj.github.io/light-ruler-pages/privacy/](https://davidzyj.github.io/light-ruler-pages/privacy/)

## Description

Light Ruler is a local-first photography calculator designed for iPhone. It is useful for landscape, long exposure, night sky, and everyday exposure planning.

You can quickly calculate:

- ND filter long exposure shutter speed
- Equivalent exposure for aperture, shutter, and ISO changes
- Depth of field, near limit, far limit, and hyperfocal distance
- Maximum night sky shutter before visible star trails
- Angle of view and equivalent focal length across sensor formats

Light Ruler does not require an account, does not connect to a backend, and does not actively make network requests. Camera profiles, lens profiles, and saved calculations are stored locally on your device.

Useful for:

- Long exposure with ND filters
- Night sky shutter planning
- Landscape depth of field and hyperfocal checks
- Comparing focal length behavior across sensor formats

## Rankings

- #1,367,451 — Overall

## Similar extensions and apps

- [Lensage: Astro & Photo Planner](https://chrome-stats.com/d/id6769730141)
- [Long Exposure Lite](https://chrome-stats.com/d/id933583440) — 1.00 / 5
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- [LExp: Landscape Photography](https://chrome-stats.com/d/id547000247) — 4.70 / 5
- [Mango Exposure: The Calculator](https://chrome-stats.com/d/id1487020105) — 5.00 / 5
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- [LightMeter Express](https://chrome-stats.com/d/id6748661409) — 4.70 / 5
- [LensCalc for Photographers](https://chrome-stats.com/d/id6769301039)
- [FilmMeter](https://chrome-stats.com/d/id6753060069) — 4.90 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6779471175)