# HydroCalc Plus vs Nexus universal calculator

The clearest difference is price: Nexus universal calculator at Free against HydroCalc Plus's $6.99. Nexus universal calculator also leads on update cadence (weekly vs every 3 weeks) and ratings volume (9 vs 1). HydroCalc Plus's advantage is ads (none vs shown). On rating, in-app purchases, device support and iOS requirement there is nothing between them.

Nexus universal calculator is free to download; HydroCalc Plus costs $6.99 up front. HydroCalc Plus sells 4 one-off in-app purchases and Nexus universal calculator sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for HydroCalc Plus against 5.0 for Nexus universal calculator. That said, the two scores are not equally well evidenced: Nexus universal calculator has 9 ratings behind it against 1, so its average is the more settled of the two.

HydroCalc Plus ships an update every 3 weeks, Nexus universal calculator weekly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HydroCalc Plus | Nexus universal calculator |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-plus/id578807688/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/nexus-universal-calculator/id6746715232/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 34 MB | 67 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Nataliia Vereshchak](https://appshunter.io/developer/1818074298) |

## What reviewers say

### HydroCalc Plus

[App page](https://appshunter.io/ios/app/hydrocalc-plus/id578807688)

A professional tool for hydraulic engineers to calculate pressure losses in piping systems. It supports US and SI units, offers an extensive pipe material and fittings database, and includes inverse calculations for design optimization.

**Highlights:** Friction head loss calculation (Hazen-Williams), US and SI unit support, Extensive pipe material library, Fittings and valves database, Inverse calculation mode, Real-time results (velocity, losses)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pump Power Calculator | $1.99 | one-time |
| System Curve Generator | $1.99 | one-time |
| Pipe Database | $1.99 | one-time |
| Industrial Fluids Pack | $2.99 | one-time |


### Nexus universal calculator

[App page](https://appshunter.io/ios/app/nexus-universal-calculator/id6746715232)

A smart calculator that remembers your calculations, allows you to reuse results in new formulas, and includes unit and currency conversion. It offers cloud sync for seamless access across devices and a clean design for everyday use, budgeting, and studying.

**Highlights:** Calculator with history, Smart formula builder, Unit and currency converter, Cloud sync across devices, Clean and simple design, Reuse past results as variables

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Month | $2.99 | per month |
| Premium year | $9.99 | per year |
| Lifetime Premium Features | $199.00 | one-time |


## Frequently asked questions

### Is HydroCalc Plus free?

HydroCalc Plus costs $6.99, and also offers in-app purchases.

### Is Nexus universal calculator free?

Nexus universal calculator is free to download, with in-app purchases available.

### Which has better reviews, HydroCalc Plus or Nexus universal calculator?

HydroCalc Plus and Nexus universal calculator are both rated 5.0 out of 5 on the App Store, from 1 and 9 ratings respectively.

### Do HydroCalc Plus or Nexus universal calculator have ads?

Nexus universal calculator shows ads; HydroCalc Plus does not.

### Which is updated more often, HydroCalc Plus or Nexus universal calculator?

HydroCalc Plus ships an update every 3 weeks, and Nexus universal calculator weekly. Most recently, HydroCalc Plus was updated on October 23, 2026 and Nexus universal calculator on October 24, 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.*