# TreeOneOne vs Learn Acoustics Engineering

The clearest difference is price: TreeOneOne at Free against Learn Acoustics Engineering's $2.99. TreeOneOne also leads on update cadence (weekly vs every 20 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

TreeOneOne is free to download; Learn Acoustics Engineering costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TreeOneOne ships an update weekly, Learn Acoustics Engineering every 20 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | TreeOneOne | Learn Acoustics Engineering |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/treeoneone/id6450873900/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 20 months |
| Size | 1 MB | 77 MB |
| Requires iOS | 16.3 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Jeremy Gordon](https://appshunter.io/developer/1589115034) | [Muhammad Umair](https://appshunter.io/developer/1696049320) |

## What reviewers say

### TreeOneOne

[App page](https://appshunter.io/ios/app/treeoneone/id6450873900)

**In-app purchases:** none


### Learn Acoustics Engineering

[App page](https://appshunter.io/ios/app/learn-acoustics-engineering/id6451270819)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TreeOneOne free?

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

### Is Learn Acoustics Engineering free?

Learn Acoustics Engineering costs $2.99, with no in-app purchases.

### Do TreeOneOne or Learn Acoustics Engineering have ads?

Neither TreeOneOne nor Learn Acoustics Engineering shows ads.

### Which is updated more often, TreeOneOne or Learn Acoustics Engineering?

TreeOneOne ships an update weekly, and Learn Acoustics Engineering every 20 months. Most recently, TreeOneOne was updated on October 27, 2026 and Learn Acoustics Engineering on October 27, 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.*