# TimerGlass

> Reciprocity Failure Calculator

Canonical page: [https://chrome-stats.com/d/id6761681913](https://chrome-stats.com/d/id6761681913)

## Overview

- **ID:** `id6761681913`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 存滨 崔
- **Category:** Photo & Video
- **Version:** 2.0
- **Last updated:** 2026-09-17
- **First published:** 2026-04-07
- **Size:** 4.80 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/timerglass/id6761681913)
- **Website:** [https://www.argentglass.com/en/apps/timerglass](https://www.argentglass.com/en/apps/timerglass)
- **Privacy policy:** [https://www.argentglass.com/en/apps/timerglass/privacy](https://www.argentglass.com/en/apps/timerglass/privacy)

## Description

After the reciprocity math, it stays with you until that frame is done. TimerGlass 2.0.

TimerGlass is the field companion for film photographers — reciprocity, pinhole geometry, exposure estimation, and a beautiful timer, all in one quietly designed app.

WHAT IT DOES
• Reciprocity failure correction for 100+ film stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX, CineStill, Lomography and more) — built from manufacturer data sheets.
• ND filter stack and bellows extension compensation are folded into the same calculation.
• Pinhole camera tool — Lord Rayleigh's optimal aperture, effective f-number, equivalent angle of view by film format, and Sunny-16 exposure estimation that flows straight into the timer.
• Long-exposure timer with Live Activity and Dynamic Island, accurate even when your phone is locked.
• Long-exposure side-effects advice — pull-development guidance for B&W, color-shift tips for negative and slide film, contextual to your actual exposure time.
• History of recent exposures with all the parameters you used.
• Custom film stocks — define your own with power-law or lookup-table reciprocity curves.

DESIGNED FOR
Large-format and pinhole photographers who do long exposures often, 35mm and medium-format shooters chasing dusk and night scenes, and anyone tired of squinting at a film data sheet by torchlight.

LANGUAGES
English, 简体中文, 繁體中文, 日本語, Deutsch, Français.

PRIVACY
TimerGlass collects nothing. Everything you do stays on your device.

## Rankings

- #1,058,642 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6761681913)