# Biblio UDIMA vs OpoZulo

The clearest difference is in-app purchases: Biblio UDIMA at none against OpoZulo's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OpoZulo sells 3 in-app purchases, starting at $3.99 per month. Biblio UDIMA asks for nothing beyond the download.

Biblio UDIMA ships an update fortnightly, OpoZulo weekly. The most recent releases landed on November 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Biblio UDIMA | OpoZulo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 71 MB | 65 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ODILOTID SL](https://appshunter.io/developer/976580041) | [Carlos Garcia Marmol](https://appshunter.io/developer/6795084870) |

## What reviewers say

### Biblio UDIMA

[App page](https://appshunter.io/ios/app/biblio-udima/id6667111320)

**In-app purchases:** none


### OpoZulo

[App page](https://appshunter.io/ios/app/opozulo-planifica-oposiciones/id6795084868)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpoZulo PRO Mensual | $3.99 | per month |
| OpoZulo PRO Descuento Anual | $19.99 | per year |
| OpoZulo PRO Anual | $29.99 | per year |


## Frequently asked questions

### Is Biblio UDIMA free?

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

### Is OpoZulo free?

OpoZulo is free to download, with in-app purchases available.

### Do Biblio UDIMA or OpoZulo have ads?

Neither Biblio UDIMA nor OpoZulo shows ads.

### Which is updated more often, Biblio UDIMA or OpoZulo?

Biblio UDIMA ships an update fortnightly, and OpoZulo weekly. Most recently, Biblio UDIMA was updated on November 4, 2026 and OpoZulo on October 10, 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.*