# XobéBook vs Prevision Lab

The clearest difference is iOS requirement: Prevision Lab at 15.0 against XobéBook's 17.0. 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.

XobéBook ships an update every 3 weeks, Prevision Lab fortnightly. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | XobéBook | Prevision Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 39 MB | 3 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Abdourahmane Fall](https://appshunter.io/developer/1752052847) | [MARIANNE (App)](https://appshunter.io/developer/6804716767) |

## What reviewers say

### XobéBook

[App page](https://appshunter.io/ios/app/xobebook/id6756220512)

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

**In-app purchases:** none


### Prevision Lab

[App page](https://appshunter.io/ios/app/prevision-lab/id6806963145)

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

**In-app purchases:** none


## Frequently asked questions

### Is XobéBook free?

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

### Is Prevision Lab free?

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

### Do XobéBook or Prevision Lab have ads?

Neither XobéBook nor Prevision Lab shows ads.

### Which is updated more often, XobéBook or Prevision Lab?

XobéBook ships an update every 3 weeks, and Prevision Lab fortnightly. Most recently, XobéBook was updated on October 30, 2026 and Prevision Lab on October 29, 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.*