Comparison

Flow Rate Help vs Pressure Vessel Thickness Pro

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

Head to head
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

About

Pressure Vessel Thickness Pro

Calculate the required design and nominal thickness for various pressure vessel components, including shells, heads, and cones, according to ASME Section VIII Div 1 codes. This offline tool offers high performance for engineers in process equipment manufacturing.

Highlights
  • Shell thickness calculation
  • Head thickness calculation (Hemi, Tori, Ellipsoidal)
  • Cone thickness calculation
  • ASME Section VIII Div 1 compliance
  • Offline functionality
  • High performance
Features
Read full description

Pressure Vessel Thickness Calculator is a professional engineering tool for calculating required pressure vessel component thickness for internal pressure applications. It is designed for pressure vessel engineers, mechanical engineers, process equipment designers, and engineering professionals who need quick thickness calculations and design verification. The app provides calculations for pressure vessel shells, heads, and conical components using applicable formulas based on ASME Section VIII Division 1 requirements. It is useful during preliminary design, engineering calculations, equipment evaluation, and quick verification of pressure vessel thickness. Available Thickness Calculators • Shell Thickness Calculator • Hemispherical Head Thickness Calculator • Torispherical Head Thickness Calculator • 2:1 Ellipsoidal Head Thickness Calculator • Conical Shell Thickness Calculator Shell Thickness Calculate required shell thickness for cylindrical pressure vessel components subjected to internal pressure. Useful for preliminary pressure vessel design and checking required wall thickness based on the applicable design parameters. Hemispherical Head Thickness Calculate required thickness for hemispherical pressure vessel heads under internal pressure conditions. Torispherical Head Thickness Calculate required thickness for torispherical pressure vessel heads using the applicable design parameters and calculation formula. 2:1 Ellipsoidal Head Thickness Calculate required thickness for commonly used 2:1 ellipsoidal pressure vessel heads. Conical Shell Thickness Calculate required thickness for conical pressure vessel sections subjected to internal pressure. Design & Nominal Thickness The application can assist with determining required design thickness and estimating nominal thickness by considering the relevant design inputs and allowances used in the calculation. Features • Pressure vessel shell thickness calculation • Pressure vessel head thickness calculation • Hemispherical head calculation • Torispherical head calculation • 2:1 ellipsoidal head calculation • Conical shell thickness calculation • Internal pressure design calculations • Design thickness calculation • Nominal thickness estimation • ASME Section VIII Division 1 based formulas • Metric and Imperial unit support • Automatic unit conversion • Clear engineering results • Fast calculations • Simple professional interface • No internet connection required • No distracting advertisements Applications Pressure Vessel Thickness Calculator is useful for: • Pressure Vessel Design • Process Equipment Design • Pressure Vessel Fabrication • Heat Exchanger Design • Reactor Design • Column and Tower Design • Storage Tank Engineering • Industrial Equipment Design • Mechanical Engineering • Engineering Design Verification Designed For • Pressure Vessel Engineers • Mechanical Engineers • Design Engineers • Process Engineers • Fabrication Engineers • Equipment Designers • Project Engineers • Engineering Consultants • QA/QC Professionals • Engineering Students Pressure Vessel Thickness Calculator provides a convenient way to perform common pressure vessel thickness calculations and quickly review required component thickness during engineering and design work. Whether you are checking a cylindrical shell, hemispherical head, torispherical head, 2:1 ellipsoidal head, or conical section, the app provides a practical calculation tool for pressure vessel and process equipment engineering. Important: Results should be independently verified by a qualified engineer and against the applicable edition, requirements, material properties, design conditions, and other provisions of the governing design code before being used for final pressure vessel design or fabrication.

Screenshots

Flow Rate Help3 screens
Pressure Vessel Thickness Pro4 screens

Verdict

The call

The clearest difference is rating: Flow Rate Help at 4.3 against Pressure Vessel Thickness Pro's 1.0. Flow Rate Help also leads on ratings volume (44 vs 1) and update cadence (every 15 months vs every 41 months). On review sentiment, ads, in-app purchases and monetization model 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 Help costs $0.99 and Pressure Vessel Thickness Pro $3.99 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 1.0. 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 Help ships an update every 15 months, Pressure Vessel Thickness Pro every 41 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard6 real differences · 4 level
Flow Rate Help versus Pressure Vessel Thickness Pro: the parameters behind the verdict, then further details
ParameterFlow Rate HelpPressure Vessel Thickness Pro
Price$0.99 — better$3.99
Rating4.3 (44 ratings) — better1.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings44 — better1
Update frequencyEvery 15 months — betterEvery 41 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS11.0 — better16.1
Further details — not scored
Size3 MB1 MB
Age rating4+4+
DeveloperArmchair EngineeringImran Pinjara

Customer experience

Flow Rate Help

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

Pressure Vessel Thickness Pro

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Flow Rate Help

No in-app purchases

None

Pressure Vessel Thickness Pro

No in-app purchases

Questions

Is Flow Rate Help free?
Flow Rate Help costs $0.99, with no in-app purchases.
Is Pressure Vessel Thickness Pro free?
Pressure Vessel Thickness Pro costs $3.99, with no in-app purchases.
Which has better reviews, Flow Rate Help or Pressure Vessel Thickness Pro?
Flow Rate Help is rated higher. Flow Rate Help averages 4.3 out of 5 from 44 ratings, while Pressure Vessel Thickness Pro averages 1.0 from 1 ratings.
Do Flow Rate Help or Pressure Vessel Thickness Pro have ads?
Neither Flow Rate Help nor Pressure Vessel Thickness Pro shows ads.
Which is updated more often, Flow Rate Help or Pressure Vessel Thickness Pro?
Flow Rate Help ships an update every 15 months, and Pressure Vessel Thickness Pro every 41 months. Most recently, Flow Rate Help was updated on October 24, 2026 and Pressure Vessel Thickness Pro on October 29, 2026.

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