# Imperial Plexus vs Rockunion1898

The clearest difference is update cadence: Rockunion1898 at every 4 weeks against Imperial Plexus's every 50 months. Imperial Plexus's advantage is iOS requirement (11.0 vs 16.0). 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.

Imperial Plexus ships an update every 50 months, Rockunion1898 every 4 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Imperial Plexus | Rockunion1898 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 4 weeks** |
| Size | 12 MB | 80 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Imperial College London](https://appshunter.io/developer/547377669) | [Toucan Tech](https://appshunter.io/developer/1487516191) |

## What reviewers say

### Imperial Plexus

[App page](https://appshunter.io/ios/app/imperial-plexus/id1339365012)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rockunion1898

[App page](https://appshunter.io/ios/app/rockunion1898/id6743443318)

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

**In-app purchases:** none


## Frequently asked questions

### Is Imperial Plexus free?

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

### Is Rockunion1898 free?

Rockunion1898 is free to download, with no in-app purchases.

### Do Imperial Plexus or Rockunion1898 have ads?

Neither Imperial Plexus nor Rockunion1898 shows ads.

### Which is updated more often, Imperial Plexus or Rockunion1898?

Imperial Plexus ships an update every 50 months, and Rockunion1898 every 4 weeks. Most recently, Imperial Plexus was updated on October 26, 2026 and Rockunion1898 on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*