# ProBox.vn vs K2 Horizon

The clearest difference is update cadence: K2 Horizon at every 5 days against ProBox.vn's every 3 months. 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.

ProBox.vn ships an update every 3 months, K2 Horizon every 5 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ProBox.vn | K2 Horizon |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Size | 15 MB | 43 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Lam Hoang Anh](https://appshunter.io/developer/1221785830) | [Mohamed bin Zayed University of Artificial Intelligence](https://appshunter.io/developer/1809622856) |

## What reviewers say

### ProBox.vn

[App page](https://appshunter.io/ios/app/proboxvn/id1565916654)

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

**In-app purchases:** none


### K2 Horizon

[App page](https://appshunter.io/ios/app/k2-horizon/id6744862356)

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

**In-app purchases:** none


## Frequently asked questions

### Is ProBox.vn free?

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

### Is K2 Horizon free?

K2 Horizon is free to download, with no in-app purchases.

### Do ProBox.vn or K2 Horizon have ads?

Neither ProBox.vn nor K2 Horizon shows ads.

### Which is updated more often, ProBox.vn or K2 Horizon?

ProBox.vn ships an update every 3 months, and K2 Horizon every 5 days. Most recently, ProBox.vn was updated on October 16, 2026 and K2 Horizon on October 7, 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.*