# UNOi 4 vs Refereence

The clearest difference is update cadence: Refereence at every 3 weeks against UNOi 4's every 6 weeks. UNOi 4's advantage is iOS requirement (14.0 vs 16.4). 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.

UNOi 4 ships an update every 6 weeks, Refereence every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | UNOi 4 | Refereence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/unoi-4/id1473453935/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 135 MB | 118 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Grupo Santillana Educacion Global, S.L.](https://appshunter.io/developer/445034184) | [Rodrigo Rodriguez Pacheco](https://appshunter.io/developer/1585733051) |

## What reviewers say

### UNOi 4

[App page](https://appshunter.io/ios/app/unoi-4/id1473453935)

This app transforms classroom management by centering the student and breaking down subject barriers. It fosters learning through engagement and practical application, aiming to create transformative citizens.

**Highlights:** Student-centered learning, Interdisciplinary approach, Learning through engagement, Practical application focus, Classroom management transformation

**In-app purchases:** none


### Refereence

[App page](https://appshunter.io/ios/app/refereence/id1585733049)

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

**In-app purchases:** none


## Frequently asked questions

### Is UNOi 4 free?

UNOi 4 is free to download, with no in-app purchases.

### Is Refereence free?

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

### Do UNOi 4 or Refereence have ads?

Neither UNOi 4 nor Refereence shows ads.

### Which is updated more often, UNOi 4 or Refereence?

UNOi 4 ships an update every 6 weeks, and Refereence every 3 weeks. Most recently, UNOi 4 was updated on October 24, 2026 and Refereence on October 20, 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.*