# ProBooks.app vs BarTree

The clearest difference is update cadence: BarTree at every 8 days against ProBooks.app's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ProBooks.app ships an update every 3 weeks, BarTree every 8 days. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ProBooks.app | BarTree |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 41 MB | 82 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Valon Feka](https://appshunter.io/developer/1494975205) | [QUANTIFY NEXUS L.L.C.](https://appshunter.io/developer/6787418586) |

## What reviewers say

### ProBooks.app

[App page](https://appshunter.io/ios/app/probooksapp/id6761665561)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### BarTree

[App page](https://appshunter.io/ios/app/bartree/id6787418584)

**In-app purchases:** none


## Frequently asked questions

### Is ProBooks.app free?

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

### Is BarTree free?

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

### Do ProBooks.app or BarTree have ads?

Neither ProBooks.app nor BarTree shows ads.

### Which is updated more often, ProBooks.app or BarTree?

ProBooks.app ships an update every 3 weeks, and BarTree every 8 days. Most recently, ProBooks.app was updated on September 19, 2026 and BarTree on September 23, 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.*