# Pressure Vessel Thickness Pro vs Bellows Design Software

The clearest difference is price: Bellows Design Software at Free against Pressure Vessel Thickness Pro's $3.99. Bellows Design Software also leads on rating (5.0 vs 1.0) and update cadence (monthly vs every 41 months). Pressure Vessel Thickness Pro's advantage is in-app purchases (none vs 2). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Bellows Design Software is free to download; Pressure Vessel Thickness Pro costs $3.99 up front. Bellows Design Software sells 2 in-app purchases, starting at $34.99 per month. Pressure Vessel Thickness Pro asks for nothing beyond the download.

Bellows Design Software holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Pressure Vessel Thickness Pro ships an update every 41 months, Bellows Design Software monthly. Both last shipped on September 15, 2026.

## The numbers

| Metric | Pressure Vessel Thickness Pro | Bellows Design Software |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/pressure-vessel-thickness-pro/id1492059118/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bellows-design-software/id1635945221/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 41 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 26 MB |
| Requires iOS | 16.1 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Pressure Vessel Thickness Pro

[App page](https://appshunter.io/ios/app/pressure-vessel-thickness-pro/id1492059118)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Bellows Design Software

[App page](https://appshunter.io/ios/app/bellows-design-software/id1635945221)

This application assists in designing metallic bellows type expansion joints according to EJMA Standards. It allows users to input various design parameters and movement inputs to ensure safe and reliable usage. The software performs comprehensive calculations and checks against EJMA conditions for different bellows configurations and materials.

**Highlights:** Design metallic bellows expansion joints, Input internal diameter, convolution height, ply thickness, pitch, and number of plies, Set design pressure, temperature, and movements, Check design parameters against EJMA Standards, Calculations for single and dual bellows, Includes vibration and bellows forming methods, Calculations for tie rods, lugs plate, and hinges

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access for Bellows | $34.99 | per month |
| All Access for Bellows Design | $299.99 | per year |


## Frequently asked questions

### Is Pressure Vessel Thickness Pro free?

Pressure Vessel Thickness Pro costs $3.99, with no in-app purchases.

### Is Bellows Design Software free?

Bellows Design Software is free to download, with in-app purchases available.

### Which has better reviews, Pressure Vessel Thickness Pro or Bellows Design Software?

Bellows Design Software is rated higher. Pressure Vessel Thickness Pro averages 1.0 out of 5 from 1 ratings, while Bellows Design Software averages 5.0 from 1 ratings.

### Do Pressure Vessel Thickness Pro or Bellows Design Software have ads?

Neither Pressure Vessel Thickness Pro nor Bellows Design Software shows ads.

### Which is updated more often, Pressure Vessel Thickness Pro or Bellows Design Software?

Pressure Vessel Thickness Pro ships an update every 41 months, and Bellows Design Software monthly. Most recently, Pressure Vessel Thickness Pro was updated on September 15, 2026 and Bellows Design Software on September 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*