# Alt Process Exposure Cal

> Stouffer calibration

Canonical page: [https://chrome-stats.com/d/id6753609684](https://chrome-stats.com/d/id6753609684)

## Overview

- **ID:** `id6753609684`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Vanessa Short
- **Category:** Productivity
- **Version:** 1.0.1
- **Last updated:** 2025-10-30
- **First published:** 2025-10-30
- **Size:** 23 MB
- **Data as of:** 2026-09-26
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/alt-process-exposure-cal/id6753609684)
- **Privacy policy:** [https://itsasalfordthing.squarespace.com/privacy-policy-exposure-calculator](https://itsasalfordthing.squarespace.com/privacy-policy-exposure-calculator)

## Description

Find your standard exposure time. Calibrate with a stouffer, save paper notes, and export to Google Sheets. Built for cyanotype, Platinum/Palladium, carbon, salt & more.

Alt Process Exposure Calc helps you lock in a reliable “standard exposure” for alternative photographic printing. Enter your baseline time, the first max-black step from a wedge where you can not see a line from the transparency or white if you are calibrating polymer, and steps-per-stop—then the app does the maths and records your setup.

Made for
Cyanotype, Platinum/Palladium, Salt, Carbon, Photopolymer & other alt processes.

What it does:

Calculates a precise standard exposure from a step wedge.

Simple process picker (Cyanotype, Platinum/Palladium, Salt, Carbon, Photopolymer, Other).

Optional notes for paper, ink, and aquatint timing.

Export your records to Google Sheets (with an included Apps Script you paste once).

Newest-first log with pastel row tinting by process.

How export works
You’ll paste a small, safe Google Apps Script into a Sheet (instructions in-app). Tap Export to push a new row with the date, process, exposure, and notes. The sheet auto-formats and keeps the latest records at the top.

Why it helps

records exposures across papers and processes

A clean archive of what actually worked

Subscription
Alt Process Exposure Calc uses an auto-renewing yearly subscription for full access (pricing shown in-app).
• Payment is charged to your Apple ID at confirmation of purchase.
• Subscription renews automatically unless cancelled at least 24 hours before the end of the period.
• Manage or cancel in Settings → Apple ID → Subscriptions.

Happy printing!

Full access is available with an annual subscription.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://itsasalfordthing.squarespace.com/privacy-policy-exposure-calculator

## Rankings

- #1,592,042 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6753609684)