Alt Process Exposure Cal
Stouffer calibration
$2.99 · In‑App Purchases · Designed for iPad
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
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Subscriptions
The developer, Vanessa Short, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
For more information, visit the developer’s accessibility website .
Information
- Seller
- Vanessa Short
- Size
- 23.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Yearly subscription access $2.99
- Copyright
- © 2025 vanessa short Its a Salford Thing
