# Plumbing Formulator vs Taco Tools

The clearest difference is in-app purchases: Taco Tools at none against Plumbing Formulator's 4. Taco Tools also leads on review sentiment (20% vs 9%) and iOS requirement (15.6 vs 18.6). Plumbing Formulator's advantage is update cadence (every 2 months vs every 5 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Plumbing Formulator sells 4 one-off in-app purchases. Taco Tools asks for nothing beyond the download.

Plumbing Formulator ships an update every 2 months, Taco Tools every 5 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | Plumbing Formulator | Taco Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/plumbing-formulator/id303497783/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 9.1% of reviews | **20.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 123 MB | 52 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Taco, Inc.](https://appshunter.io/developer/461800454) |

## What reviewers say

### Plumbing Formulator

[App page](https://appshunter.io/ios/app/plumbing-formulator/id303497783)

This professional calculator app provides over 200 formulas, calculators, and reference materials for plumbers, HVAC technicians, and mechanical contractors. It covers a wide range of calculations for water flow, piping, drainage, water heaters, pumps, and more, all in one pocket-sized tool.

**Highlights:** Over 200 formulas and calculators, Water flow and supply calculations, Pipe and piping calculations, Drainage and venting calculations, Water heater and pump calculations, Reference charts and code books, Pipe cut list optimizer

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $1.99 | one-time |
| Pro Purchase | $3.99 | one-time |
| Starter | $5.99 | one-time |
| Growth | $9.99 | one-time |


### 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


## Frequently asked questions

### Is Plumbing Formulator free?

Plumbing Formulator is free to download, with in-app purchases available.

### Is Taco Tools free?

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

### Do Plumbing Formulator or Taco Tools have ads?

Neither Plumbing Formulator nor Taco Tools shows ads.

### Which is updated more often, Plumbing Formulator or Taco Tools?

Plumbing Formulator ships an update every 2 months, and Taco Tools every 5 months. Most recently, Plumbing Formulator was updated on October 23, 2026 and Taco Tools on October 23, 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.*