# TPZ — Tree Protection Zone

> Tree Protection Zone (iPhone/iPad app by Brad Bowden.)

- Source: https://appshunter.io/ios/app/tpz/id1434647036 (this page in markdown: same URL + `.md`)
- Developer: [Brad Bowden](https://appshunter.io/developer/743465921)
- Category: Utilities, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 12 MB
- Languages: American English
- Released: 2018-08-31
- Data updated: 2026-01-23
- User reviews in markdown: https://appshunter.io/ios/app/tpz/id1434647036/reviews.md

## What is TPZ?

The TPZ app provides a tree protection zone radius calculator to assist those involved in the care and management of urban trees when or where construction and development activities are proposed.  

By inputting the stem diameter or stem circumference measurement, the calculation will then determine the TPZ radius - outlining the area required for protection of the root plate and tree crown.


## Version history (last 3 releases)

### 1.1.1 — 2025-03-31

- Minor improvements and bug fixes to ensure a smoother user experience.

### 1.1 — 2025-02-18

- Updated to fully support the latest iOS versions for enhanced compatibility and performance.
- Minor improvements and bug fixes to ensure a smoother user experience.

### 1.0 — 2018-08-30

This app has been updated by Apple to display the Apple Watch app icon.

## Apps similar to TPZ

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [WWC Drum Calculator](https://appshunter.io/ios/app/wwc-drum-calculator/id6746688045) | — | Free | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-01-23.*