# Imttech IV vs CSL Rudder

The clearest difference is update cadence: Imttech IV at every 3 weeks against CSL Rudder's every 2 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.

Imttech IV ships an update every 3 weeks, CSL Rudder every 2 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Imttech IV | CSL Rudder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 56 MB | 116 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [IMT Tech Sdn Bhd](https://appshunter.io/developer/1287476008) | [Cochin Shipyard Limited](https://appshunter.io/developer/1586582946) |

## What reviewers say

### Imttech IV

[App page](https://appshunter.io/ios/app/imttech-iv/id1457838453)

**In-app purchases:** none


### CSL Rudder

[App page](https://appshunter.io/ios/app/csl-rudder/id1609654236)

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

**In-app purchases:** none


## Frequently asked questions

### Is Imttech IV free?

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

### Is CSL Rudder free?

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

### Do Imttech IV or CSL Rudder have ads?

Neither Imttech IV nor CSL Rudder shows ads.

### Which is updated more often, Imttech IV or CSL Rudder?

Imttech IV ships an update every 3 weeks, and CSL Rudder every 2 months. Most recently, Imttech IV was updated on November 2, 2026 and CSL Rudder on November 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.*