# Structural Engineering Calc. vs Pressure Vessel Heads Pro

The clearest difference is rating: Structural Engineering Calc. at 4.5 against Pressure Vessel Heads Pro's 1.0. Structural Engineering Calc. also leads on update cadence (every 10 months vs every 41 months) and ratings volume (21 vs 1). Pressure Vessel Heads Pro's advantage is price ($3.99 vs $5.99). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Structural Engineering Calc. costs $5.99 and Pressure Vessel Heads Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Structural Engineering Calc. holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Structural Engineering Calc. has 21 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.

Structural Engineering Calc. ships an update every 10 months, Pressure Vessel Heads Pro every 41 months. The most recent releases landed on October 23, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Structural Engineering Calc. | Pressure Vessel Heads Pro |
| --- | --- | --- |
| Price | $5.99 | **$3.99** |
| Rating | **[4.5 (21 ratings)](https://appshunter.io/ios/app/structural-engineering-calc/id590507987/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/pressure-vessel-heads-pro/id1486607999/reviews) |
| Number of ratings | **21** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 41 months |
| Monetization | Paid | Paid |
| Size | 6 MB | 1 MB |
| Requires iOS | 17.6 | **16.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### Structural Engineering Calc.

[App page](https://appshunter.io/ios/app/structural-engineering-calc/id590507987)

This app provides 59 essential structural engineering formulas for columns, beams, base plates, composite beams, and connections. It offers instant demand/capacity checks, a built-in AISC section database, and material references, supporting both USCS and SI units for on-site or office use.

**Highlights:** 59 structural formulas, Instant demand/capacity checks, Built-in AISC section database, Material and code references, USCS & SI unit support, Pass/Fail visual indicators

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Pressure Vessel Heads Pro

[App page](https://appshunter.io/ios/app/pressure-vessel-heads-pro/id1486607999)

Calculate dimensions for various vessel heads like flat, torispherical, ellipsoidal, and hemispherical. Generates layout markings and coordinates for 2:1 ellipsoidal heads with customizable part divisions. All inputs are in millimeters.

**Highlights:** Calculate blank diameter, Calculate crown radius, Calculate knuckle radius, Calculate height (with/without SF), Supports flat, torispherical, ellipsoidal, and hemispherical heads, 2:1 ellipsoidal head template layout marking, Customizable layout part divisions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Structural Engineering Calc. free?

Structural Engineering Calc. costs $5.99, with no in-app purchases.

### Is Pressure Vessel Heads Pro free?

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

### Which has better reviews, Structural Engineering Calc. or Pressure Vessel Heads Pro?

Structural Engineering Calc. is rated higher. Structural Engineering Calc. averages 4.5 out of 5 from 21 ratings, while Pressure Vessel Heads Pro averages 1.0 from 1 ratings.

### Do Structural Engineering Calc. or Pressure Vessel Heads Pro have ads?

Neither Structural Engineering Calc. nor Pressure Vessel Heads Pro shows ads.

### Which is updated more often, Structural Engineering Calc. or Pressure Vessel Heads Pro?

Structural Engineering Calc. ships an update every 10 months, and Pressure Vessel Heads Pro every 41 months. Most recently, Structural Engineering Calc. was updated on October 23, 2026 and Pressure Vessel Heads Pro on October 1, 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.*