# Pressure loss vs HydroCalc Basic

The clearest difference is in-app purchases: Pressure loss at none against HydroCalc Basic's 1. Pressure loss also leads on iOS requirement (12.0 vs 15.1). HydroCalc Basic's advantage is update cadence (every 11 days vs every 45 months). On price, ads and device support there is nothing between them.

Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase. Pressure loss asks for nothing beyond the download.

Pressure loss ships an update every 45 months, HydroCalc Basic every 11 days. The most recent releases landed on October 26, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Pressure loss | HydroCalc Basic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 11 days** |
| Size | 8 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [U-Tube Systems B.V.](https://appshunter.io/developer/1406001356) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Pressure loss

[App page](https://appshunter.io/ios/app/pressure-loss-calc/id1406001357)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |
| --- | --- | --- |
| Pro Pack | $5.99 | one-time |


## Frequently asked questions

### Is Pressure loss free?

Pressure loss is free to download, with no in-app purchases.

### Is HydroCalc Basic free?

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

### Do Pressure loss or HydroCalc Basic have ads?

Neither Pressure loss nor HydroCalc Basic shows ads.

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

Pressure loss ships an update every 45 months, and HydroCalc Basic every 11 days. Most recently, Pressure loss was updated on October 26, 2026 and HydroCalc Basic on November 8, 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.*