# HydroSewer vs PipeDN

HydroSewer and PipeDN are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. HydroSewer sells 1 one-off in-app purchase and PipeDN sells 3 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HydroSewer | PipeDN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 51 MB | 40 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [AQUILES DE LIMA](https://appshunter.io/developer/1883397199) |

## What reviewers say

### 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 |


### PipeDN

[App page](https://appshunter.io/ios/app/pipedn/id6760237428)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PipeDN Pro | $4.99 | per year |
| PipeDN Pro | $7.99 | per month |
| PipeDN Pro | $79.99 | one-time |


## Frequently asked questions

### Is HydroSewer free?

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

### Is PipeDN free?

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

### Do HydroSewer or PipeDN have ads?

Neither HydroSewer nor PipeDN shows ads.

### Which is updated more often, HydroSewer or PipeDN?

HydroSewer ships an update every 3 weeks, and PipeDN every 3 weeks. Most recently, HydroSewer was updated on October 29, 2026 and PipeDN on October 31, 2026.

---

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