I Work At Site Calculator
Field calculators and timer
Free · Designed for iPad. Not verified for macOS.
I Work At Site Calculator is a lightweight utility app designed for field and site work.
It provides simple, reliable calculators for common on-site tasks, including:
• Drawdown timing with saved results
• Target mix calculations (start from zero concentration)
• Unit conversions for drawdown rates
• Pipe and volume calculations
The app is built to work fully offline with no accounts, no ads, and no data collection. All values are stored locally on your device only.
Designed for quick use in the field on both iPhone and iPad.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added A new Dilution Calculator
The developer, Ryan Knisley, 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
Information
- Seller
- Ryan Knisley
- Size
- 20.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Ryan Knisley