# HydroSewer vs HydroniCalc

The clearest difference is iOS requirement: HydroSewer at 15.0 against HydroniCalc's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HydroSewer sells 1 one-off in-app purchase and HydroniCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | HydroSewer | HydroniCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 51 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Eric Chmara](https://appshunter.io/developer/1892404568) |

## 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 |


### HydroniCalc

[App page](https://appshunter.io/ios/app/hydronicalc/id6796810526)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Calculators | $12.99 | one-time |


## Frequently asked questions

### Is HydroSewer free?

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

### Is HydroniCalc free?

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

### Do HydroSewer or HydroniCalc have ads?

Neither HydroSewer nor HydroniCalc shows ads.

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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.*