App profile & analytics · Utilities · Data updated 2026-10-06

Light Ruler: Photo Toolkit

by 小倩徐 · Free · Version 3.0.3

Availability On the App Store since June 2026 ↗

Light Ruler: Photo Toolkit is made and published by 小倩徐. AppBrain is an independent app data site and isn't affiliated with 小倩徐. The app name, icon, screenshots and description belong to 小倩徐 and are shown as published on the App Store.

About Light Ruler: Photo Toolkit

Light Ruler: Photo Toolkit is an utilities app developed by 小倩徐.

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App Information

Light Ruler: Photo Toolkit is freely available from the App Store. The app size is 1.12 MB. The latest version available is 3.0.3. The last update was on September 6, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since June 2026.

Description by 小倩徐 (from the App Store)

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

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Screenshots

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Screenshots by 小倩徐, from the the App Store listing

Official page on the App Store

Alternatives to Light Ruler: Photo Toolkit

Changelog of Light Ruler: Photo Toolkit

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小倩徐

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