Comparison

Pressure Vessel Pro vs Fastener Dimensions

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

Head to head
About

Pressure Vessel Pro

Perform essential pressure vessel stress calculations with ease. Input dimensions for various tank geometries and instantly get results, including detailed formulae and ASME code compliance. Generate and share PDF reports with schematics.

Highlights
  • Pressure vessel stress calculations
  • ASME Boiler & Pressure Vessel Code compliance
  • Support for vertical, horizontal, and spherical tanks
  • Component stress calculations (cylinders, heads)
  • Generate and share PDF reports
  • Flexible unit system (Metric/English)
  • Save multiple calculation cases
Features
Read full description

Pressure Vessel Pro - Pressure vessel calculations for iOS. The easiest way to do basic pressure vessel stress calculations. Simply select from the available geometries, enter in the required dimensions and the answers will be generated complete with the formulae. You can also easily print or email a PDF of your results along with a schematic of the pressure vessel. Pressure Vessel Pro Features: - Universal - designed for use on all sizes of iPhone, iPod Touch, and iPad - Share or print a PDF report of the results - Extremely flexible unit system. Choose Metric, English or mix and match units. - Save multiple cases for later reference - Tap a cell to show detail and formulae The properties calculated include are: • Longitudinal Stress • Hoop Stress • Shear Stress • Volume • ASME Boiler & Pressure Vessel Code Design Thickness • ASME Boiler & Pressure Vessel Code Design Pressure Pressure Vessel Pro includes the Following Integrated Calculations: • Vertical tanks • Horizontal tanks • Spherical tanks Pressure Vessel Pro includes the Following Component Stress Calculations: • Cylinders • Hemispherical Heads and Tanks • Elliptical Heads • Torispherical Heads Pressure Vessel Pro includes the Following ASME Boiler and Pressure Vessel Code Section VIII, Division I Design Calculations: • Cylinder Thickness • Cylinder Pressure • Hemispherical Heads and Tanks Thickness • Hemispherical Heads and Tanks Pressure • 2:1 Elliptical Head Thickness • 2:1 Elliptical Head Pressure • ASME (dished) Heads Thickness • ASME (dished) Heads Pressure Check out our other engineering apps by searching the iTunes store for: • Moments of Inertia • Mohr's Circle • Stress Concentrations Pro • Stress Intensity Factors Pro or search J.R.Hobbs to see them all.

About

Fastener Dimensions

This app provides a comprehensive guide to various types of fasteners, including bolts, nuts, pins, and washers. Explore diverse options and dimensions to meet specific project requirements and enhance your understanding of these essential components.

Highlights
  • Dimensions of bolts, nuts, pins, and washers
  • Variety of bolt types (e.g., countersunk, hex head flange)
  • Range of nut types (e.g., hex, wing)
  • Intricacies of pin types (e.g., clevis, cylindrical, tapered)
  • Choices of washer types (e.g., plain, spring)
  • Guide for project requirements
Features
Read full description

Explore the world of fasteners with our comprehensive application that delves into the diverse dimensions of bolts, nuts, pins, and washers. Uncover a variety of options to suit your specific needs, from sleek countersunk bolts to robust hex head flange bolts. Choose from an extensive range of nuts, including the versatile hex nut and the unique wing nut. Dive into the intricacies of pins, from the dependable clevis pin to the sleek cylindrical and tapered options. Elevate your understanding of washers with choices like the classic plain washer and the functional spring washer. This app is your go-to guide for fasteners, offering a wealth of options to meet every project requirement.

Screenshots

Pressure Vessel Pro4 screens
Fastener Dimensions4 screens

Verdict

The call

The clearest difference is rating: Pressure Vessel Pro at 4.5 against Fastener Dimensions's 2.3. Pressure Vessel Pro also leads on review sentiment (33% vs 0%). Fastener Dimensions's advantage is price ($4.99 vs $5.99). On ratings volume, 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

Pressure Vessel Pro costs $5.99 and Fastener Dimensions $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Pressure Vessel Pro holds the better App Store score, 4.5 against 2.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 33% of Pressure Vessel Pro's written reviews are positive against 0% of Fastener Dimensions's.

UpkeepUpdate frequency

Pressure Vessel Pro ships an update every 5 months, Fastener Dimensions every 6 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Pressure Vessel Pro versus Fastener Dimensions: the parameters behind the verdict, then further details
ParameterPressure Vessel ProFastener Dimensions
Price$5.99$4.99 — better
Rating4.5 (2 ratings) — better2.3 (3 ratings)
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings23 — better
Update frequencyEvery 5 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size10 MB62 MB
Age rating4+4+
DeveloperJ.R.HobbsAjay Gorasiya

Customer experience

Pressure Vessel Pro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral66.7%
Negative0.0%

Fastener Dimensions

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Pressure Vessel Pro

No in-app purchases

None

Fastener Dimensions

No in-app purchases

Questions

Is Pressure Vessel Pro free?
Pressure Vessel Pro costs $5.99, with no in-app purchases.
Is Fastener Dimensions free?
Fastener Dimensions costs $4.99, with no in-app purchases.
Which has better reviews, Pressure Vessel Pro or Fastener Dimensions?
Pressure Vessel Pro is rated higher. Pressure Vessel Pro averages 4.5 out of 5 from 2 ratings, while Fastener Dimensions averages 2.3 from 3 ratings.
Do Pressure Vessel Pro or Fastener Dimensions have ads?
Neither Pressure Vessel Pro nor Fastener Dimensions shows ads.
Which is updated more often, Pressure Vessel Pro or Fastener Dimensions?
Pressure Vessel Pro ships an update every 5 months, and Fastener Dimensions every 6 months. Most recently, Pressure Vessel Pro was updated on November 1, 2026 and Fastener Dimensions on November 8, 2026.

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