# Java Zertifizierung vs Octopus

The clearest difference is review sentiment: Octopus at 71% against Java Zertifizierung's 0%. Octopus also leads on update cadence (monthly vs every 11 months). Java Zertifizierung's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Octopus sells 4 in-app purchases, starting at $9.99 per month. Java Zertifizierung asks for nothing beyond the download.

Java Zertifizierung ships an update every 11 months, Octopus monthly. The most recent releases landed on September 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Java Zertifizierung | Octopus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/octopus-learn-programming/id1565140788/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | **71.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 45 MB | 107 MB |
| Requires iOS | **11.0** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eberhard Heuel](https://appshunter.io/developer/881793184) | [Alaa CHERBIB](https://appshunter.io/developer/1097070945) |

## What reviewers say

### Java Zertifizierung

[App page](https://appshunter.io/ios/app/java-zertifizierung/id1306846281)

This app offers a free introductory chapter to learning Java programming, ideal for beginners. Full access requires booking through the FernUniversität in Hagen, leading to a university certificate upon passing an exam.

**Highlights:** Free introductory chapter, University-backed curriculum, Learn Java programming fundamentals, Build small programs independently, Online or campus exam options, University certificate awarded

**Features:** macOS Compatibility

**In-app purchases:** none


### Octopus

[App page](https://appshunter.io/ios/app/octopus-learn-programming/id1565140788)

Learn to code in popular languages like Python, Java, Swift, and JavaScript, plus web development with HTML and CSS. Offers detailed tutorials and interactive exercises for all skill levels. Join a community of learners to advance your programming journey.

**Highlights:** Learn Python, Java, Swift, JavaScript, Web development with HTML and CSS, Detailed tutorials, Interactive coding exercises, Community collaboration, Courses for all levels

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Learn programming - 1 Month | $9.99 | per month |
| Learn programming - 3 Months | $24.99 | per 3 months |
| Learn programming - 1 Year | $84.99 | per year |
| Learn programming - No limits | $44.99 | one-time |


## Frequently asked questions

### Is Java Zertifizierung free?

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

### Is Octopus free?

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

### Do Java Zertifizierung or Octopus have ads?

Octopus shows ads; Java Zertifizierung does not.

### Which is updated more often, Java Zertifizierung or Octopus?

Java Zertifizierung ships an update every 11 months, and Octopus monthly. Most recently, Java Zertifizierung was updated on September 24, 2026 and Octopus on October 7, 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.*