# Biblioteca Digital USM vs Ulern

The clearest difference is in-app purchases: Biblioteca Digital USM at none against Ulern's 6. Ulern's advantage is update cadence (every 6 days vs fortnightly) and iOS requirement (14.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Ulern sells 6 in-app purchases, starting at $0.99 per 7 days. Biblioteca Digital USM asks for nothing beyond the download.

Biblioteca Digital USM ships an update fortnightly, Ulern every 6 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Biblioteca Digital USM | Ulern |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/biblioteca-digital-usm/id1539133267/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free | — |
| Size | 72 MB | 77 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ODILOTID SL](https://appshunter.io/developer/976580041) | [Ulern](https://appshunter.io/developer/1817026359) |

## What reviewers say

### Biblioteca Digital USM

[App page](https://appshunter.io/ios/app/biblioteca-digital-usm/id1539133267)

Access a curated selection of texts from the university's collections. This digital library is available to the entire university community, offering convenient access to academic resources.

**Highlights:** Access to selected texts, University community resource, Digital collection access, Convenient resource access

**In-app purchases:** none


### Ulern

[App page](https://appshunter.io/ios/app/ulern/id6736619861)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ulern Plus Semanal | $0.99 | per 7 days |
| Ulern Plus | $1.99 | per month |
| Ulern Plus Semanal | $3.99 | per 7 days |
| Ulern Plus | $8.99 | per month |
| Ulern Plus Anual | $14.99 | per year |
| Ulern Plus | $79.99 | per year |


## Frequently asked questions

### Is Biblioteca Digital USM free?

Biblioteca Digital USM is free to download, with no in-app purchases.

### Is Ulern free?

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

### Do Biblioteca Digital USM or Ulern have ads?

Neither Biblioteca Digital USM nor Ulern shows ads.

### Which is updated more often, Biblioteca Digital USM or Ulern?

Biblioteca Digital USM ships an update fortnightly, and Ulern every 6 days. Most recently, Biblioteca Digital USM was updated on October 24, 2026 and Ulern on October 6, 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.*