# Flow Rate Help vs Pressure Vessel Thickness

The clearest difference is update cadence: Flow Rate Help at every 15 months against Pressure Vessel Thickness's every 56 months. Flow Rate Help also leads on price ($0.99 vs $2.99) and device support (4 vs 2). 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 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Help ships an update every 15 months, Pressure Vessel Thickness every 56 months. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Flow Rate Help | Pressure Vessel Thickness |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[4.3 (44 ratings)](https://appshunter.io/ios/app/flow-rate-help/id1009898806/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 56 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

[App page](https://appshunter.io/ios/app/pressure-vessel-thickness/id1492098075)

Calculate the required design and nominal thickness for various pressure vessel components according to ASME Section VIII Div 1 codes. This tool assists designers in determining the necessary thickness for shell, hemispherical, torispherical, ellipsoidal, and conical heads under internal pressure.

**Highlights:** Calculate design thickness, Calculate nominal thickness, Shell thickness calculation, Head thickness calculation (Hemi, Tori, Ellipsoidal), Cone thickness calculation, ASME Section VIII Div 1 compliance

**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 free?

Pressure Vessel Thickness costs $2.99, with no in-app purchases.

### Do Flow Rate Help or Pressure Vessel Thickness have ads?

Neither Flow Rate Help nor Pressure Vessel Thickness shows ads.

### Which is updated more often, Flow Rate Help or Pressure Vessel Thickness?

Flow Rate Help ships an update every 15 months, and Pressure Vessel Thickness every 56 months. Most recently, Flow Rate Help was updated on October 6, 2026 and Pressure Vessel Thickness 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.*