# Pipe Pressure drop calculator vs SpecPad

The clearest difference is update cadence: SpecPad at every 10 days against Pipe Pressure drop calculator's every 3 months. Pipe Pressure drop calculator's advantage is iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pipe Pressure drop calculator sells 1 one-off in-app purchase and SpecPad sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Pipe Pressure drop calculator ships an update every 3 months, SpecPad every 10 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pipe Pressure drop calculator | SpecPad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/pipe-pressure-drop-calculator/id6752385472/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 19 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) | [John Steinmetz](https://appshunter.io/developer/1881750415) |

## What reviewers say

### Pipe Pressure drop calculator

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

Calculate pipe pressure drop, friction loss, and liquid velocity using the Darcy–Weisbach equation. Supports a wide range of pipe materials, liquids, and diameters for engineers and students.

**Highlights:** Calculate pressure drop, friction loss, and liquid velocity, Supports 76 pipe materials, Supports 58 liquid types, Handles pipe diameters up to 84 inches, Useful for pipeline design and hydraulic systems

**Features:** macOS Compatibility

**In-app purchases (1)**

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


### SpecPad

[App page](https://appshunter.io/ios/app/specpad/id6787570085)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpecPad Pro - Monthly | $2.99 | per month |
| SpecPad Pro - Yearly | $17.99 | per year |
| SpecPad Pro - Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Pipe Pressure drop calculator free?

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

### Is SpecPad free?

SpecPad is free to download, with in-app purchases available.

### Do Pipe Pressure drop calculator or SpecPad have ads?

Neither Pipe Pressure drop calculator nor SpecPad shows ads.

### Which is updated more often, Pipe Pressure drop calculator or SpecPad?

Pipe Pressure drop calculator ships an update every 3 months, and SpecPad every 10 days. Most recently, Pipe Pressure drop calculator was updated on October 30, 2026 and SpecPad on October 24, 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.*