# 21a OBMEP vs Prova Fácil Professor

The clearest difference is in-app purchases: 21a OBMEP at none against Prova Fácil Professor's 3. 21a OBMEP also leads on update cadence (every 4 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Prova Fácil Professor sells 3 one-off in-app purchases. 21a OBMEP asks for nothing beyond the download.

21a OBMEP ships an update every 4 days, Prova Fácil Professor every 5 months. The most recent releases landed on November 5, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 21a OBMEP | Prova Fácil Professor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/21a-obmep/id6744337826/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 months |
| Monetization | Free | — |
| Size | 21 MB | 39 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Instituto de Matematica Pura e Aplicada](https://appshunter.io/developer/1626544658) | [Starline Tecnologia](https://appshunter.io/developer/895949087) |

## What reviewers say

### 21a OBMEP

[App page](https://appshunter.io/ios/app/21a-obmep/id6744337826)

This app allows school administrators to digitize and submit student answer sheets for a math competition. It also facilitates the completion of administrative forms related to the competition.

**Highlights:** Digitize answer sheets, Submit student responses, Fill out administrative forms, Digital submission of answer cards, Complete RAIG and Shipping Document

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

**In-app purchases:** none


### Prova Fácil Professor

[App page](https://appshunter.io/ios/app/prova-facil-professor/id6748157585)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prova Fácil Professor | $2.99 | one-time |
| Prova Fácil Professor | $4.99 | one-time |
| Créditos Professor Prova fácil | $29.99 | one-time |


## Frequently asked questions

### Is 21a OBMEP free?

21a OBMEP is free to download, with no in-app purchases.

### Is Prova Fácil Professor free?

Prova Fácil Professor is free to download, with in-app purchases available.

### Do 21a OBMEP or Prova Fácil Professor have ads?

Neither 21a OBMEP nor Prova Fácil Professor shows ads.

### Which is updated more often, 21a OBMEP or Prova Fácil Professor?

21a OBMEP ships an update every 4 days, and Prova Fácil Professor every 5 months. Most recently, 21a OBMEP was updated on November 5, 2026 and Prova Fácil Professor on September 27, 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.*