# HydroSewer vs Culvert Studio

The clearest difference is in-app purchases: Culvert Studio at none against HydroSewer's 1. Culvert Studio also leads on update cadence (daily vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HydroSewer sells 1 one-off in-app purchase. Culvert Studio asks for nothing beyond the download.

HydroSewer ships an update every 3 weeks, Culvert Studio daily. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | HydroSewer | Culvert Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 51 MB | 43 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Jagdeep Singh](https://appshunter.io/developer/1865361721) |

## 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 |


### Culvert Studio

[App page](https://appshunter.io/ios/app/culvert-studio/id6758688358)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroSewer free?

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

### Is Culvert Studio free?

Culvert Studio is free to download, with no in-app purchases.

### Do HydroSewer or Culvert Studio have ads?

Neither HydroSewer nor Culvert Studio shows ads.

### Which is updated more often, HydroSewer or Culvert Studio?

HydroSewer ships an update every 3 weeks, and Culvert Studio daily. Most recently, HydroSewer was updated on October 29, 2026 and Culvert Studio on October 18, 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.*