# TreeMeasure Pro vs Opti Clinometer

The clearest difference is in-app purchases: Opti Clinometer at none against TreeMeasure Pro's 2. Opti Clinometer also leads on iOS requirement (17.0 vs 26.0). TreeMeasure Pro's advantage is device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. TreeMeasure Pro sells 2 in-app purchases, starting at $3.99 per month. Opti Clinometer asks for nothing beyond the download.

TreeMeasure Pro ships an update every 3 days, Opti Clinometer every 2 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | TreeMeasure Pro | Opti Clinometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 12 MB | 2 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Florin Nicola](https://appshunter.io/developer/1834914789) | [Burak Kizilobek](https://appshunter.io/developer/6788531231) |

## What reviewers say

### TreeMeasure Pro

[App page](https://appshunter.io/ios/app/treemeasure-pro/id6760644907)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TreeMeasure Pro Monthly | $3.99 | per month |
| TreeMeasure Pro Yearly | $39.99 | per year |


### Opti Clinometer

[App page](https://appshunter.io/ios/app/opti-clinometer/id6788531229)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TreeMeasure Pro free?

TreeMeasure Pro is free to download, with in-app purchases available.

### Is Opti Clinometer free?

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

### Do TreeMeasure Pro or Opti Clinometer have ads?

Neither TreeMeasure Pro nor Opti Clinometer shows ads.

### Which is updated more often, TreeMeasure Pro or Opti Clinometer?

TreeMeasure Pro ships an update every 3 days, and Opti Clinometer every 2 days. Most recently, TreeMeasure Pro was updated on October 24, 2026 and Opti Clinometer on October 19, 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.*