# Pipe Sizer vs HydroSewer

The clearest difference is price: HydroSewer at Free against Pipe Sizer's $0.99. HydroSewer also leads on update cadence (every 2 months vs every 27 months) and iOS requirement (15.0 vs 17.6). Pipe Sizer's advantage is in-app purchases (none vs 1) and chart position (#194 vs unranked). On ads and device support there is nothing between them.

HydroSewer is free to download; Pipe Sizer costs $0.99 up front. HydroSewer sells 1 one-off in-app purchase. Pipe Sizer asks for nothing beyond the download.

Pipe Sizer ships an update every 27 months, HydroSewer every 2 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Pipe Sizer | HydroSewer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Monetization | Paid | — |
| Best chart rank | **#194** | — |
| Size | 1 MB | 24 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Pipe Sizer

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

**Currently charting:** #194 Top Paid · Utilities (US App Store)

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


### HydroSewer

[App page](https://appshunter.io/ios/app/hydrosewer-drainage-network/id6754671899)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HydroSewer Pro | $14.99 | one-time |


## Frequently asked questions

### Is Pipe Sizer free?

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

### Is HydroSewer free?

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

### Do Pipe Sizer or HydroSewer have ads?

Neither Pipe Sizer nor HydroSewer shows ads.

### Which is updated more often, Pipe Sizer or HydroSewer?

Pipe Sizer ships an update every 27 months, and HydroSewer every 2 months. Most recently, Pipe Sizer was updated on October 25, 2026 and HydroSewer on October 25, 2026.

---

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