# Flow Rate Help vs Pressure Vessel Thickness Pro

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.

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.

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.

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.

## The numbers

| Metric | Flow Rate Help | Pressure Vessel Thickness Pro |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| Rating | **[4.3 (44 ratings)](https://appshunter.io/ios/app/flow-rate-help/id1009898806/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/pressure-vessel-thickness-pro/id1492059118/reviews) |
| Number of ratings | **44** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 41 months |
| Monetization | Paid | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | **11.0** | 16.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### Flow Rate Help

[App page](https://appshunter.io/ios/app/flow-rate-help/id1009898806)

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:** Vision Pro support

**In-app purchases:** none


### 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


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