# Taco Tools vs HydroCalc Plus

The clearest difference is review sentiment: HydroCalc Plus at 100% against Taco Tools's 20%. HydroCalc Plus also leads on update cadence (every 3 weeks vs every 5 months). Taco Tools's advantage is price (Free vs $3.99) and in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.

Taco Tools is free to download; HydroCalc Plus costs $3.99 up front. HydroCalc Plus sells 4 one-off in-app purchases. Taco Tools asks for nothing beyond the download.

Taco Tools ships an update every 5 months, HydroCalc Plus every 3 weeks. The most recent releases landed on September 18, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Taco Tools | HydroCalc Plus |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-plus/id578807688/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 20.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 52 MB | 34 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Taco, Inc.](https://appshunter.io/developer/461800454) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Taco Tools

[App page](https://appshunter.io/ios/app/taco-tools/id461800450)

Easily select centrifugal pumps for hydronic heating and cooling systems. View pump performance characteristics for specific flow and head conditions. Access Taco product literature and contact technical support directly.

**Highlights:** Centrifugal pump selection, Performance characteristic viewing, Hydronic heating/cooling system application, Access to product literature, Direct technical support contact

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Taco Tools free?

Taco Tools is free to download, with no in-app purchases.

### Is HydroCalc Plus free?

HydroCalc Plus costs $3.99, and also offers in-app purchases.

### Do Taco Tools or HydroCalc Plus have ads?

Neither Taco Tools nor HydroCalc Plus shows ads.

### Which is updated more often, Taco Tools or HydroCalc Plus?

Taco Tools ships an update every 5 months, and HydroCalc Plus every 3 weeks. Most recently, Taco Tools was updated on September 18, 2026 and HydroCalc Plus on August 31, 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.*