# Sigma vs Certificação Linux

The clearest difference is in-app purchases: Sigma at none against Certificação Linux's 3. Certificação Linux's advantage is update cadence (every 4 months vs every 18 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Certificação Linux sells 3 one-off in-app purchases. Sigma asks for nothing beyond the download.

Sigma ships an update every 18 months, Certificação Linux every 4 months. The most recent releases landed on September 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sigma | Certificação Linux |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sigma-cursos-e-treinamentos/id6737171831/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 28 MB | 38 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Converta LTDA](https://appshunter.io/developer/1649419890) | [Uira Ribeiro](https://appshunter.io/developer/6778160711) |

## What reviewers say

### Sigma

[App page](https://appshunter.io/ios/app/sigma-cursos-e-treinamentos/id6737171831)

This app offers professional training courses recognized for teaching excellence and innovation. It aims to transform lives through practical and theoretical knowledge, preparing students for global market challenges.

**Highlights:** Professionalizante education, Pedagogical innovation, Career impact, Practical and theoretical knowledge, Global market preparation

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

**In-app purchases:** none


### Certificação Linux

[App page](https://appshunter.io/ios/app/certificacao-linux/id6778160709)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Linux Essentials | $49.99 | one-time |
| Curso Linux LPIC-1 | $49.99 | one-time |
| Curso LPIC-2 | $49.99 | one-time |


## Frequently asked questions

### Is Sigma free?

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

### Is Certificação Linux free?

Certificação Linux is free to download, with in-app purchases available.

### Do Sigma or Certificação Linux have ads?

Neither Sigma nor Certificação Linux shows ads.

### Which is updated more often, Sigma or Certificação Linux?

Sigma ships an update every 18 months, and Certificação Linux every 4 months. Most recently, Sigma was updated on September 13, 2026 and Certificação Linux on October 24, 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.*