# RIB CX vs 321 X

The clearest difference is update cadence: 321 X at every 3 weeks against RIB CX's every 5 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.

RIB CX ships an update every 5 weeks, 321 X every 3 weeks. The most recent releases landed on August 12, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | RIB CX | 321 X |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 241 MB | 324 MB |
| Requires iOS | **14.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RIB Software](https://appshunter.io/developer/667161440) | [Invesco Australia Limited](https://appshunter.io/developer/1577113922) |

## What reviewers say

### RIB CX

[App page](https://appshunter.io/ios/app/rib-cx/id1477435260)

Manage your project documents from anywhere with this mobile application. Create, view, respond to, and issue RIB CX documents on the go. Access your entire Document Register to stay organized and efficient.

**Highlights:** Create RIB CX documents, View RIB CX documents, Respond to RIB CX documents, Issue RIB CX documents, Access Document Register, On-the-go document management

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

**In-app purchases:** none


### 321 X

[App page](https://appshunter.io/ios/app/321-x/id6749880991)

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RIB CX free?

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

### Is 321 X free?

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

### Do RIB CX or 321 X have ads?

Neither RIB CX nor 321 X shows ads.

### Which is updated more often, RIB CX or 321 X?

RIB CX ships an update every 5 weeks, and 321 X every 3 weeks. Most recently, RIB CX was updated on August 12, 2026 and 321 X on September 14, 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.*