Apps by Armchair Engineering
Flow Rate Help app icon

Utilities

Flow Rate Help

Armchair Engineering

$0.99 4.30 · 1 storefront · 44 ratings In-app purchases
Open on Apple

About this app

Quickly find flow rate, required pipe diameter or velocity of a liquid! Features Include: - Accurately solve flow rate equations - Set preferred diameter unit from: mm, cm, m, km, inches, feet, yards and miles - Set preferred velocity unit from: m/s, m/min, km/min, km/h, ft/s, ft/min, mi/min and mph - Set preferred flow rate unit from: m³/s, m³/min, m³/h, l/s, l/min, l/h, gps. gpm and gph - Select your preferred number of decimal places

Latest release

What’s New

Version 1.4 Jun 25, 2020

- Dark mode improvements

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
44 ratings
44 Aug 12, 2026 · 44 ratings Aug 12, 2026

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

1 captured event
Current $0.99
Historical low USD 0.99
Paid → free
Price history
Current $0.99
$0.99 $0.50 Free Aug 12, 2026 · $0.99 Aug 12, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 12, 2026 · 10:34 PM $0.99

Screenshots

Flow Rate Help iPhone screenshotFlow Rate Help iPhone screenshot Flow Rate Help iPad screenshotFlow Rate Help iPad screenshot