# I Work At Site Calculator — Field calculators and timer

> Field calculators and timer (iPhone/iPad app by Ryan Knisley.)

- Source: https://appshunter.io/ios/app/i-work-at-site-calculator/id6757588472 (this page in markdown: same URL + `.md`)
- Developer: [Ryan Knisley](https://appshunter.io/developer/1867434341)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: American English
- Released: 2026-01-19
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/i-work-at-site-calculator/id6757588472/reviews.md

## What is I Work At Site Calculator?

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.


## Version history (last 2 releases)

### 1.0.1 — 2026-02-08

Added A new Dilution Calculator

### 1.0 — 2026-01-18

No release notes.

## More apps by Ryan Knisley

- [Maintenance Tracker](https://appshunter.io/ios/app/maintenance-tracker/id6757522265)

All apps by Ryan Knisley: https://appshunter.io/developer/1867434341

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*