# PlumbCalc Pro vs HydroCalc

The clearest difference is device support: HydroCalc at 2 against PlumbCalc Pro's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. PlumbCalc Pro sells 2 in-app purchases, starting at $9.99 per month and HydroCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | PlumbCalc Pro | HydroCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 3 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yusuf Can Samiloglu](https://appshunter.io/developer/1863275820) | [Piotr Kaminski](https://appshunter.io/developer/6799375980) |

## What reviewers say

### PlumbCalc Pro

[App page](https://appshunter.io/ios/app/plumbcalc-pro/id6760953725)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PlumbCalc Pro Monthly | $9.99 | per month |
| PlumbCalc Pro Yearly | $99.99 | per year |


### HydroCalc

[App page](https://appshunter.io/ios/app/hydrocalc-heating-and-flow/id6801788464)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HydroCalc Pro | $3.99 | one-time |


## Frequently asked questions

### Is PlumbCalc Pro free?

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

### Is HydroCalc free?

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

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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.*