# HydroCalc Basic vs HydroCalc

The clearest difference is update cadence: HydroCalc Basic at every 11 days against HydroCalc's every 2 months. HydroCalc Basic also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

HydroCalc Basic ships an update every 11 days, HydroCalc every 2 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HydroCalc Basic | HydroCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 months |
| Size | 35 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Piotr Kaminski](https://appshunter.io/developer/6799375980) |

## What reviewers say

### HydroCalc Basic

[App page](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Flow Units & Ad-Free | $1.99 | one-time |


### 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 HydroCalc Basic free?

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

### Is HydroCalc free?

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

### Do HydroCalc Basic or HydroCalc have ads?

Neither HydroCalc Basic nor HydroCalc shows ads.

### Which is updated more often, HydroCalc Basic or HydroCalc?

HydroCalc Basic ships an update every 11 days, and HydroCalc every 2 months. Most recently, HydroCalc Basic was updated on October 21, 2026 and HydroCalc on October 25, 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.*