# Plumbing Formulator vs Komunitree

The clearest difference is in-app purchases: Komunitree at none against Plumbing Formulator's 4. Komunitree also leads on update cadence (every 4 days vs every 2 months) and iOS requirement (16.4 vs 18.6). 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. Komunitree asks for nothing beyond the download.

Plumbing Formulator ships an update every 2 months, Komunitree every 4 days. The most recent releases landed on September 26, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Plumbing Formulator | Komunitree |
| --- | --- | --- |
| 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 4 days** |
| Monetization | Free | — |
| Size | 123 MB | 140 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Skunk Works OPC](https://appshunter.io/developer/1704173771) |

## 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 |


### Komunitree

[App page](https://appshunter.io/ios/app/komunitree/id6463238149)

**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 Komunitree free?

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

### Do Plumbing Formulator or Komunitree have ads?

Neither Plumbing Formulator nor Komunitree shows ads.

### Which is updated more often, Plumbing Formulator or Komunitree?

Plumbing Formulator ships an update every 2 months, and Komunitree every 4 days. Most recently, Plumbing Formulator was updated on September 26, 2026 and Komunitree on September 17, 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.*