About this app
This app is designed for wastewater operators and engineers who need easy to use formulas for daily lab work or troubleshooting problems. There are over 75 formulas for calculating wastewater processes. The formulas are organized by process type. This app only uses English measurements. Answers can be emailed. You can view an online demo at h3apps.com.
Latest release
What’s New
Updated ios version, bug fixes and performance improvements
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 16, 2026 · 12:40 AM $8.99
Screenshots
