# Plumbing Formulator vs MHT Technician

The clearest difference is in-app purchases: MHT Technician at none against Plumbing Formulator's 4. MHT Technician also leads on iOS requirement (10.0 vs 18.6). Plumbing Formulator's advantage is update cadence (every 2 months vs every 5 months). On price, ads and device support there is nothing between them.

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

Plumbing Formulator ships an update every 2 months, MHT Technician every 5 months. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Plumbing Formulator | MHT Technician |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 123 MB | 55 MB |
| Requires iOS | 18.6 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Sigma Go Solutions Inc](https://appshunter.io/developer/1583604891) |

## 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 |


### MHT Technician

[App page](https://appshunter.io/ios/app/mht-technician/id1588380821)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Plumbing Formulator free?

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

### Is MHT Technician free?

MHT Technician is free to download, with no in-app purchases.

### Do Plumbing Formulator or MHT Technician have ads?

Neither Plumbing Formulator nor MHT Technician shows ads.

### Which is updated more often, Plumbing Formulator or MHT Technician?

Plumbing Formulator ships an update every 2 months, and MHT Technician every 5 months. Most recently, Plumbing Formulator was updated on October 6, 2026 and MHT Technician on October 14, 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.*