Best Flow Rate Help Apps

249+ iOS apps curated and reviewed

4.5 avg rating
17 free apps
Updated August 2026

Finding the right flow rate help apps can be overwhelming with so many options. We've analyzed 249+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Flow Rate Help Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Flow Rate HelpFlow Rate Help$0.994.3★ (44)NoNoAug 2026
2Pipe Flow Liquid Flow RatePipe Flow Liquid Flow RateFree4.8★ (4)NoYesJul 2026
3Pipe Flow Gas Flow RatePipe Flow Gas Flow RateFree5.0★ (7)NoYesMay 2026
4Pipe Flow CalculationsPipe Flow CalculationsFreeNoNoMay 2026
5Flow ConversionsFlow ConversionsFree5.0★ (1)NoNoMay 2026
6Pipe Flow Wizard - CalculatorPipe Flow Wizard - CalculatorFree4.5★ (101)NoYesJul 2026
7Flow Rate ConversionFlow Rate Conversion$2.993.0★ (1)NoNoMay 2026
8ESC Gas Flow Rate CalculatorESC Gas Flow Rate CalculatorFreeNoYesMay 2026

Top Picks for Flow Rate Help

Flow Rate Help#1

Flow Rate Help by Armchair Engineering

Velocity + Diameter Calculator
Editor's Choice
🔧 Utilities
4.3(44 ratings)
$0.99
Flow Rate Help screenshot 1
Flow Rate Help screenshot 2
Flow Rate Help screenshot 3

Calculate liquid flow rate, pipe diameter, or velocity with ease. Customize units for diameter, velocity, and flow rate, and set your preferred decimal places for precise results.

Pipe Flow Liquid Flow Rate#2

Pipe Flow Liquid Flow Rate by Daxesoft Ltd

Find Flow, Friction Loss Calc
Strong Contender
🔧 Utilities
4.8(4 ratings)
FreeIn-App Purchases
Pipe Flow Liquid Flow Rate screenshot 1
Pipe Flow Liquid Flow Rate screenshot 2
Pipe Flow Liquid Flow Rate screenshot 3
Pipe Flow Liquid Flow Rate screenshot 4
Pipe Flow Liquid Flow Rate screenshot 5
Pipe Flow Liquid Flow Rate screenshot 6

Calculate fluid flow rate in pipes, including friction and fitting losses, using accurate engineering equations. Features extensive databases for liquids, pipes, and fittings, with customizable units and reporting options.

Pipe Flow Gas Flow Rate#3

Pipe Flow Gas Flow Rate by Daxesoft Ltd

Find Flow, Friction Loss Calc
Worth Considering
🔧 Utilities
5.0(7 ratings)
FreeIn-App Purchases
Pipe Flow Gas Flow Rate screenshot 1
Pipe Flow Gas Flow Rate screenshot 2
Pipe Flow Gas Flow Rate screenshot 3
Pipe Flow Gas Flow Rate screenshot 4
Pipe Flow Gas Flow Rate screenshot 5
Pipe Flow Gas Flow Rate screenshot 6

This utility app calculates gas flow rates in pipes, accounting for friction and fitting losses using compressible isothermal equations. It offers extensive databases for materials, fittings, and gases, with customizable units and reporting options.

More Flow Rate Help apps to explore

4
Pipe Flow Calculations
Pipe Flow Calculations
Pipe Flow Calculations
Fluid Flow Calculator
Free
🔧 Utilities
(0)
5
Flow Conversions
Flow Conversions
Flow Conversions
Water flow conversions
Free

Easily convert water flow rates between various units of measurement. This utility app provides a straightforward way to calculate and understand different flow rate values.

Calculate flow rateMultiple units of measureWater flow conversions
🔧 Utilities
(1)
free
6
Pipe Flow Wizard - Calculator
Pipe Flow Wizard - Calculator
Pipe Flow Wizard - Calculator
Flow Rate & Pressure Loss Calc
Free

Calculate fluid flow rate and pressure loss in pipes. This app helps engineers determine pipe diameter, maximum pipe length, and friction loss for both liquid and gas flows, including fittings and elevation changes. Results can be shared as Excel or PDF reports.

Flow rate calculationsPressure loss calculationsPipe diameter sizing
🔧 Utilities
(101)
free with in-app purchases
7
Flow Rate Conversion
Flow Rate Conversion
Flow Rate Conversion
Convert between Flow Rate Unit
$2.99

Easily convert between various units of flow rate, including volume-based, mass-based, and mole-based measurements. Essential for physics and engineering applications involving fluid dynamics and hydrometry.

Volume flow rate conversionMass flow rate conversionMole-based flow rate conversion
🔧 Utilities
(1)
paid
8
ESC Gas Flow Rate Calculator
ESC Gas Flow Rate Calculator
ESC Gas Flow Rate Calculator
Measure & calculate flow rates
Free
🔧 Utilities
(0)
9
Pipe Flow Gas Pipe Length
Pipe Flow Gas Pipe Length
Pipe Flow Gas Pipe Length
Find Length,Friction Loss Calc
Free

This app calculates the maximum pipe length for gas flow before pressure loss exceeds a specified rate. It offers comprehensive results, customizable databases for materials and fittings, and supports various units. Engineers can generate professional reports and verify calculations against published data.

Maximum pipe length calculationFriction loss and fitting loss analysisCustomizable databases for materials, fluids, and fittings
🔧 Utilities
(1)
free with in-app purchases
10
Flow Rate Converter
Flow Rate Converter
Flow Rate Converter
Calculate flow rates in ml.h⁻¹
$0.99

This utility app calculates flow rates in milliliters per hour based on substance concentration and dosage. It can also determine the required dosage for a set flow rate. Features a user-friendly interface and an iPad widget for quick calculations.

Calculate flow rate in ml/hDetermine required dosageUser-friendly Picker interface
🔧 Utilities
(1)
paid
11
Orifice Flow Rate Calculator
Orifice Flow Rate Calculator
Orifice Flow Rate Calculator
Natural Gas
Free

Easily calculate natural gas orifice flow rates using the AGA 3 standard. This utility app allows users to determine MCF production for a given duration, save calculations, and export data to CSV. It functions offline, requiring no cell service.

Orifice MCF CalculatorRotary (Direct) MCF CalculatorSave all calculations
🔧 Utilities
(98)
free
12
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Ovia Cycle & Pregnancy Tracker
Fertility, Ovulation, & Period
Free

Track your menstrual cycle, fertility, pregnancy, postpartum recovery, and menopause with personalized insights and expert articles. This app offers tools for ovulation prediction, baby growth tracking, and symptom management.

Period & Fertility calendarPregnancy tracker with baby growthPostpartum recovery modes
🏥 Medical
(90K)
free with in-app purchases
13
Pipe Flow Liquid Pipe Length
Pipe Flow Liquid Pipe Length
Pipe Flow Liquid Pipe Length
Find Length,Friction Loss Calc
Free

This utility app calculates the maximum pipe length for a given pressure loss, flow rate, and pipe diameter. It offers comprehensive results, customizable databases for materials and fluids, and supports both Imperial and Metric units. Engineers can generate professional reports and save results for later use.

Maximum pipe length calculationFriction loss and fitting loss calculationIntegrated databases for liquids, pipes, and fittings
🔧 Utilities
(1)
free with in-app purchases
14
TELEDYNE ISCO FlowCalc
TELEDYNE ISCO FlowCalc
TELEDYNE ISCO FlowCalc
by FutureSight Studios Ltd
Free

This utility app provides quick and accurate open channel flow rate calculations for field or office use. Select your measurement method, enter dimensions and head/velocity, and receive instant results. It supports multiple flow methods, area-velocity calculations, and unit switching.

Instant flow rate calculationsMultiple weir and flume typesArea-velocity mode for pipes
🔧 Utilities
(2)
ad-supported
15
Pipe Flow Liquid Pipe Diameter
Pipe Flow Liquid Pipe Diameter
Pipe Flow Liquid Pipe Diameter
Find Size, Friction Loss Calc
Free

This app calculates the minimum internal pipe diameter required for a specific flow rate and maximum pressure loss. It offers comprehensive results, customizable databases for materials and fluids, and generates professional reports.

Pipe diameter calculationFriction loss calculationCustomizable material and fluid databases
🔧 Utilities
(5)
free with in-app purchases
16
Pipe Diameter Calculators
Pipe Diameter Calculators
Pipe Diameter Calculators
Pipe Volume Calculator
Free
📊 Productivity
(0)
17
Flow Test Calculator
Flow Test Calculator
Flow Test Calculator
by Larry Owens
Free

Calculate hydrant flow rates and determine maximum water system flow. This tool uses a standard variation of the Hazen-Williams formula for calculations. Imperial units are currently supported, with metric coming soon.

Hydrant flow rate calculationMaximum water system flow determinationHazen-Williams formula implementation
📊 Productivity
(63)
free with in-app purchases
18
Flow Portal
Flow Portal
Flow Portal
by Senapsis Ltd
Free
🔧 Utilities
(0)
19
Plumbing Calculator & Tools
Plumbing Calculator & Tools
Plumbing Calculator & Tools
Pipe slope, flow, pressure
Free
🔧 Utilities
(0)
20
FlowXpert
FlowXpert
FlowXpert
Oil & gas calculation library
Free

This app provides a comprehensive library of certified calculations for flow and fluid properties. It is designed for use in flow and level measurement systems within the oil and gas industry.

Certified flow calculationsFluid property calculationsFlow measurement systems
💼 Business
(46)
free

FAQ about Flow Rate Help

What are the best flow rate help apps for iPhone?
Flow Rate Help tops our flow rate help apps ranking as of August 2026, with a 4.3-star average from 44 App Store ratings, and it's priced at $0.99.
Yes — 17 of the top flow rate help apps we rank are free to download, including Pipe Flow Liquid Flow Rate and Pipe Flow Gas Flow Rate.
Flow Rate Help has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 249+ flow rate help apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Flow Rate Help is a utility app that allows users to quickly calculate the flow rate, required pipe diameter, or velocity of a liquid. It offers precise solutions for flow rate equations and supports a wide range of unit customizations.
Flow Rate Help is a paid application, priced at $0.99. This one-time purchase grants you access to all its features without any recurring fees.