# Pipe Sizer vs Voltage Drop Pro

The clearest difference is update cadence: Voltage Drop Pro at every 2 months against Pipe Sizer's every 27 months. Pipe Sizer's advantage is price ($0.99 vs $3.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Pipe Sizer costs $0.99 and Voltage Drop Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pipe Sizer ships an update every 27 months, Voltage Drop Pro every 2 months. The most recent releases landed on September 25, 2026 and July 9, 2026 respectively.

## The numbers

| Metric | Pipe Sizer | Voltage Drop Pro |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/pipe-sizer-water-pipe-sizing/id1576656624/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 15 MB |
| Requires iOS | 17.6 | **17.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) |

## What reviewers say

### Pipe Sizer

[App page](https://appshunter.io/ios/app/pipe-sizer-water-pipe-sizing/id1576656624)

This utility app assists in selecting appropriate pipe diameters for water systems, supporting both pressure and gravity flow calculations. It offers automatic recommendations based on user-defined limits and incorporates multiple pipe materials and unit systems.

**Highlights:** Pressure pipe sizing, Gravity pipe sizing, Automatic pipe size recommendations, Multiple pipe material support, SI and Imperial units, Hazen-Williams and Manning equations

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

**In-app purchases:** none


### Voltage Drop Pro

[App page](https://appshunter.io/ios/app/voltage-drop-pro/id1601052433)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pipe Sizer free?

Pipe Sizer costs $0.99, with no in-app purchases.

### Is Voltage Drop Pro free?

Voltage Drop Pro costs $3.99, with no in-app purchases.

### Do Pipe Sizer or Voltage Drop Pro have ads?

Neither Pipe Sizer nor Voltage Drop Pro shows ads.

### Which is updated more often, Pipe Sizer or Voltage Drop Pro?

Pipe Sizer ships an update every 27 months, and Voltage Drop Pro every 2 months. Most recently, Pipe Sizer was updated on September 25, 2026 and Voltage Drop Pro on July 9, 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.*