# CIELO USAL vs Libros

The clearest difference is rating: CIELO USAL at 5.0 against Libros's 3.0. CIELO USAL also leads on ratings volume (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CIELO USAL holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

CIELO USAL ships an update every 2 weeks, Libros fortnightly. The most recent releases landed on September 14, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | CIELO USAL | Libros |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cielo-usal/id1403015571/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/libros-e-odilo-complutense/id1463016209/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free | Free |
| Size | 74 MB | 66 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Universidad de Salamanca](https://appshunter.io/developer/657082701) | [Odilo](https://appshunter.io/developer/976580041) |

## What reviewers say

### CIELO USAL

[App page](https://appshunter.io/ios/app/cielo-usal/id1403015571)

Access a vast library of academic, scientific, and leisure e-books. Manage loans and reservations, read online, or download titles for offline access. Customize your reading experience with adjustable fonts, brightness, and annotation tools.

**Highlights:** Browse e-book catalog, Manage loans and reservations, Download books for offline reading, Adjustable reading format, Font customization, Brightness and line spacing adjustment, Text highlighting and note-taking

**In-app purchases:** none


### Libros

[App page](https://appshunter.io/ios/app/libros-e-odilo-complutense/id1463016209)

Access a curated collection of Spanish e-books from the Complutense University of Madrid. Browse, read, borrow, and reserve titles through a user-friendly platform designed for the university community.

**Highlights:** Access curated Spanish e-books, Search and browse titles, Digital borrowing and reservations, Navigate and read content, University community focused

**In-app purchases:** none


## Frequently asked questions

### Is CIELO USAL free?

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

### Is Libros free?

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

### Which has better reviews, CIELO USAL or Libros?

CIELO USAL is rated higher. CIELO USAL averages 5.0 out of 5 from 3 ratings, while Libros averages 3.0 from 1 ratings.

### Do CIELO USAL or Libros have ads?

Neither CIELO USAL nor Libros shows ads.

### Which is updated more often, CIELO USAL or Libros?

CIELO USAL ships an update every 2 weeks, and Libros fortnightly. Most recently, CIELO USAL was updated on September 14, 2026 and Libros on August 25, 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.*