# Minha Biblioteca vs Duda

The clearest difference is update cadence: Duda at every 10 days against Minha Biblioteca's every 3 months. Duda also leads on ratings volume (104 vs 17) and iOS requirement (15.0 vs 17.6). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Minha Biblioteca against 4.9 for Duda. That said, the two scores are not equally well evidenced: Duda has 104 ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 16% of Minha Biblioteca's written reviews are positive against 22% of Duda's.

Minha Biblioteca ships an update every 3 months, Duda every 10 days. Both last shipped on October 21, 2026.

## The numbers

| Metric | Minha Biblioteca | Duda |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (17 ratings)](https://appshunter.io/ios/app/minha-biblioteca/id1467409368/reviews)** | [4.9 (104 ratings)](https://appshunter.io/ios/app/duda/id6451416655/reviews) |
| Number of ratings | 17 | **104** |
| Positive reviews | 16.0% of reviews | **21.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 183 MB | 100 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Minha Biblioteca Ltda.](https://appshunter.io/developer/1433692314) | [Cruzeiro do Sul Educacional S/A](https://appshunter.io/developer/1296966413) |

## What reviewers say

### Minha Biblioteca

[App page](https://appshunter.io/ios/app/minha-biblioteca/id1467409368)

Access and read your downloaded books offline on your iOS device. This app allows for note-taking, highlighting, and searching within texts, with a reading aloud feature. Sync your progress and annotations across devices and web platforms.

**Highlights:** Download books for offline reading, Create notes and highlights, Search within books, Read aloud functionality, Cross-device sync

**In-app purchases:** none


### Duda

[App page](https://appshunter.io/ios/app/duda/id6451416655)

This app guides students through their academic and professional journeys. It helps manage academic life and explore career options, keeping users informed and organized.

**Highlights:** Academic life management, Career exploration, Personalized educational partner, Information and organization, Goal achievement support

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

**In-app purchases:** none


## Frequently asked questions

### Is Minha Biblioteca free?

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

### Is Duda free?

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

### Which has better reviews, Minha Biblioteca or Duda?

Minha Biblioteca is rated higher. Minha Biblioteca averages 5.0 out of 5 from 17 ratings, while Duda averages 4.9 from 104 ratings.

### Do Minha Biblioteca or Duda have ads?

Neither Minha Biblioteca nor Duda shows ads.

### Which is updated more often, Minha Biblioteca or Duda?

Minha Biblioteca ships an update every 3 months, and Duda every 10 days. Most recently, Minha Biblioteca was updated on October 21, 2026 and Duda on October 21, 2026.

---

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