Comparison

Flow Rate Conversion vs Flow Rate Help

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flow Rate Conversion

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.

Highlights
  • Volume flow rate conversion
  • Mass flow rate conversion
  • Mole-based flow rate conversion
  • Physics and engineering utility
  • Fluid dynamics calculations
Features
Read full description

Flow Rate Conversion - Easily convert between various units of flow rate, whether it's volume-based, mass-based, or mole-based. In the realms of physics and engineering, especially in the domains of fluid dynamics and hydrometry, volumetric flow rate (also referred to as volume flow rate, fluid flow rate, or volume velocity) signifies the volume of fluid that traverses a given point per unit of time. It's typically denoted by the symbol Q, with the SI unit being m³/s (cubic meters per second). Another unit occasionally used is sccm (standard cubic centimeters per minute). In physics and engineering, mass flow rate represents the mass of a substance passing through a point per unit of time. It's measured in kilograms per second in SI units and in slug per second or pound per second in US customary units. The common symbol is ṁ (pronounced "m-dot"), although sometimes μ (Greek lowercase mu) is employed. Occasionally, mass flow rate is referred to as mass flux or mass current, as seen, for instance, in Fluid Mechanics, Schaum's, and other references. In this article, we adopt the more intuitive definition. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

About

Flow Rate Help

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.

Highlights
  • Solve flow rate equations
  • Customizable diameter units
  • Customizable velocity units
  • Customizable flow rate units
  • Set decimal places
Features
Read full description

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

Screenshots

Flow Rate Conversion4 screens
Flow Rate Help3 screens

Verdict

The call

The clearest difference is rating: Flow Rate Help at 4.3 against Flow Rate Conversion's 3.0. Flow Rate Help also leads on ratings volume (44 vs 1) and price ($0.99 vs $2.99). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Flow Rate Conversion costs $2.99 and Flow Rate Help $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Flow Rate Help holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Flow Rate Help has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Flow Rate Conversion ships an update every 29 months, Flow Rate Help every 15 months. The most recent releases landed on September 13, 2026 and August 6, 2026 respectively.

Scorecard4 real differences · 6 level
Flow Rate Conversion versus Flow Rate Help: the parameters behind the verdict, then further details
ParameterFlow Rate ConversionFlow Rate Help
Price$2.99$0.99 — better
Rating3.0 (1 ratings)4.3 (44 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings144 — better
Update frequencyEvery 29 monthsEvery 15 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS1311.0 — better
Further details — not scored
Size1 MB3 MB
Age rating4+4+
DeveloperNitrioArmchair Engineering

Customer experience

Flow Rate Conversion

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

Flow Rate Help

All ratings44 ratings
Positive86.4%
Neutral0.0%
Negative13.6%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Flow Rate Conversion

No in-app purchases

None

Flow Rate Help

No in-app purchases

Questions

Is Flow Rate Conversion free?
Flow Rate Conversion costs $2.99, with no in-app purchases.
Is Flow Rate Help free?
Flow Rate Help costs $0.99, with no in-app purchases.
Which has better reviews, Flow Rate Conversion or Flow Rate Help?
Flow Rate Help is rated higher. Flow Rate Conversion averages 3.0 out of 5 from 1 ratings, while Flow Rate Help averages 4.3 from 44 ratings.
Do Flow Rate Conversion or Flow Rate Help have ads?
Neither Flow Rate Conversion nor Flow Rate Help shows ads.
Which is updated more often, Flow Rate Conversion or Flow Rate Help?
Flow Rate Conversion ships an update every 29 months, and Flow Rate Help every 15 months. Most recently, Flow Rate Conversion was updated on September 13, 2026 and Flow Rate Help on August 6, 2026.

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