# Bellows Design Software vs Pipe Pressure drop calculator

The clearest difference is update cadence: Bellows Design Software at monthly against Pipe Pressure drop calculator's every 3 months. Pipe Pressure drop calculator's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Bellows Design Software sells 2 in-app purchases, starting at $34.99 per month and Pipe Pressure drop calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Bellows Design Software ships an update monthly, Pipe Pressure drop calculator every 3 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Bellows Design Software | Pipe Pressure drop calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bellows-design-software/id1635945221/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 61 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### 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 |


### Pipe Pressure drop calculator

[App page](https://appshunter.io/ios/app/pipe-pressure-drop-calculator/id6752385472)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $7.99 | one-time |


## Frequently asked questions

### Is Bellows Design Software free?

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

### Is Pipe Pressure drop calculator free?

Pipe Pressure drop calculator is free to download, with in-app purchases available.

### Do Bellows Design Software or Pipe Pressure drop calculator have ads?

Neither Bellows Design Software nor Pipe Pressure drop calculator shows ads.

### Which is updated more often, Bellows Design Software or Pipe Pressure drop calculator?

Bellows Design Software ships an update monthly, and Pipe Pressure drop calculator every 3 months. Most recently, Bellows Design Software was updated on October 2, 2026 and Pipe Pressure drop calculator on October 10, 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.*