# Pipe Pressure drop calculator vs HydroCalc Basic

The clearest difference is update cadence: HydroCalc Basic at every 11 days against Pipe Pressure drop calculator's every 3 months. Pipe Pressure drop calculator's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Pipe Pressure drop calculator ships an update every 3 months, HydroCalc Basic every 11 days. Both last shipped on September 8, 2026.

## The numbers

| Metric | Pipe Pressure drop calculator | HydroCalc Basic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 11 days** |
| Size | 61 MB | 35 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Pipe Pressure drop calculator

[App page](https://appshunter.io/ios/app/pipe-pressure-drop-calculator/id6752385472)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $7.99 | one-time |


### 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 |


## Frequently asked questions

### Is Pipe Pressure drop calculator free?

Pipe Pressure drop calculator is free to download, with in-app purchases available.

### Is HydroCalc Basic free?

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

### Do Pipe Pressure drop calculator or HydroCalc Basic have ads?

Neither Pipe Pressure drop calculator nor HydroCalc Basic shows ads.

### Which is updated more often, Pipe Pressure drop calculator or HydroCalc Basic?

Pipe Pressure drop calculator ships an update every 3 months, and HydroCalc Basic every 11 days. Most recently, Pipe Pressure drop calculator was updated on September 8, 2026 and HydroCalc Basic on September 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.*