# Taco Tools vs Psychro Chart

The clearest difference is review sentiment: Taco Tools at 20% against Psychro Chart's 0%. Psychro Chart's advantage is iOS requirement (7.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Taco Tools ships an update every 5 months, Psychro Chart every 9 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Taco Tools | Psychro Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/psychro-chart/id1072047219/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 52 MB | 27 MB |
| Requires iOS | 15.6 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Taco, Inc.](https://appshunter.io/developer/461800454) | [Condair GmbH](https://appshunter.io/developer/903871077) |

## 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


### Psychro Chart

[App page](https://appshunter.io/ios/app/psychro-chart/id1072047219)

This app simplifies complex air humidity calculations for humidification and heating needs. It allows for quick and accurate assessment of various scenarios using psychrometric or Mollier diagrams.

**Highlights:** Calculate air conditions, Determine humidification/heating needs, Perform psychrometric calculations, Use Mollier diagrams, Assess scenarios quickly

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Taco Tools free?

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

### Is Psychro Chart free?

Psychro Chart is free to download, with no in-app purchases.

### Do Taco Tools or Psychro Chart have ads?

Neither Taco Tools nor Psychro Chart shows ads.

### Which is updated more often, Taco Tools or Psychro Chart?

Taco Tools ships an update every 5 months, and Psychro Chart every 9 months. Most recently, Taco Tools was updated on October 23, 2026 and Psychro Chart 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.*