About this app
Estimate duct air velocity from airflow and duct dimensions directly on your wrist. Choose round or rectangular ductwork, enter CFM and dimensions with the Digital Crown, and view FPM immediately. Save named duct calculations for different rooms or jobs. Reload, rename, update, and delete stored calculations at any time. • Round and rectangular ducts • CFM and FPM calculations • Equivalent round diameter • Persistent job records • No internet required Field estimate only. Verify final system design requirements.
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 1, 2026 · 1:49 PM $0.99