# Preparatório OBA vs OBAdm

The clearest difference is in-app purchases: OBAdm at none against Preparatório OBA's 1. OBAdm also leads on update cadence (every 2 days vs weekly). Preparatório OBA's advantage is iOS requirement (11.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Preparatório OBA sells 1 one-off in-app purchase. OBAdm asks for nothing beyond the download.

Preparatório OBA ships an update weekly, OBAdm every 2 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Preparatório OBA | OBAdm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | — | Free |
| Size | 38 MB | 195 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Fractal Tecnologia](https://appshunter.io/developer/1232021956) | [MOBTEX DESENVOLVIMENTO DE SOFTWARE EIRELI](https://appshunter.io/developer/1532814117) |

## What reviewers say

### Preparatório OBA

[App page](https://appshunter.io/ios/app/preparatorio-oba/id1460289432)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acesso Completo | $0.99 | one-time |


### OBAdm

[App page](https://appshunter.io/ios/app/obadm/id6503164155)

This app provides online tests and an e-book for students and schools participating in OBAdm. It also features the 'Jogo Floresta Bela' game.

**Highlights:** Online tests, Jogo Floresta Bela game, E-book access, Exclusive for OBAdm participants

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

**In-app purchases:** none


## Frequently asked questions

### Is Preparatório OBA free?

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

### Is OBAdm free?

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

### Do Preparatório OBA or OBAdm have ads?

Neither Preparatório OBA nor OBAdm shows ads.

### Which is updated more often, Preparatório OBA or OBAdm?

Preparatório OBA ships an update weekly, and OBAdm every 2 days. Most recently, Preparatório OBA was updated on November 3, 2026 and OBAdm on October 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.*