# TurtleBook vs Passaporte Douro

The clearest difference is update cadence: Passaporte Douro at every 5 days against TurtleBook's every 10 days. Passaporte Douro also leads on iOS requirement (11.0 vs 13.0). 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.

TurtleBook ships an update every 10 days, Passaporte Douro every 5 days. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | TurtleBook | Passaporte Douro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Size | 33 MB | 51 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [WEBTURTLE - SOLUCOES INFORMATICAS, LDA](https://appshunter.io/developer/1635823953) | [CIM Douro](https://appshunter.io/developer/1610098606) |

## What reviewers say

### TurtleBook

[App page](https://appshunter.io/ios/app/turtlebook/id1526314751)

**Features:** Vision Pro support

**In-app purchases:** none


### Passaporte Douro

[App page](https://appshunter.io/ios/app/passaporte-douro/id1567888973)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TurtleBook free?

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

### Is Passaporte Douro free?

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

### Do TurtleBook or Passaporte Douro have ads?

Neither TurtleBook nor Passaporte Douro shows ads.

### Which is updated more often, TurtleBook or Passaporte Douro?

TurtleBook ships an update every 10 days, and Passaporte Douro every 5 days. Most recently, TurtleBook was updated on October 5, 2026 and Passaporte Douro on September 30, 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.*