# BlueKaktus vs ProX4.0

The clearest difference is iOS requirement: BlueKaktus at 11.0 against ProX4.0's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

BlueKaktus ships an update every 2 weeks, ProX4.0 every 8 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BlueKaktus | ProX4.0 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Size | 19 MB | 247 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Royal Datamatic Private Limited](https://appshunter.io/developer/1207721118) | [Rajesh Kumar](https://appshunter.io/developer/1561775105) |

## What reviewers say

### BlueKaktus

[App page](https://appshunter.io/ios/app/bluekaktus/id1476128465)

**In-app purchases:** none


### ProX4.0

[App page](https://appshunter.io/ios/app/prox40/id1624676388)

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

**In-app purchases:** none


## Frequently asked questions

### Is BlueKaktus free?

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

### Is ProX4.0 free?

ProX4.0 is free to download, with no in-app purchases.

### Do BlueKaktus or ProX4.0 have ads?

Neither BlueKaktus nor ProX4.0 shows ads.

### Which is updated more often, BlueKaktus or ProX4.0?

BlueKaktus ships an update every 2 weeks, and ProX4.0 every 8 days. Most recently, BlueKaktus was updated on October 10, 2026 and ProX4.0 on October 24, 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.*