# Java Data Structures Pro vs German B1 Writing Practice

The clearest difference is price: German B1 Writing Practice at Free against Java Data Structures Pro's $4.99. German B1 Writing Practice also leads on update cadence (fortnightly vs every 4 months). Java Data Structures Pro's advantage is iOS requirement (16.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

German B1 Writing Practice is free to download; Java Data Structures Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Java Data Structures Pro ships an update every 4 months, German B1 Writing Practice fortnightly. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Java Data Structures Pro | German B1 Writing Practice |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 18 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Kyrylo Kozlov](https://appshunter.io/developer/1600331225) |

## What reviewers say

### Java Data Structures Pro

[App page](https://appshunter.io/ios/app/java-data-structures-pro/id6756707292)

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

**In-app purchases:** none


### German B1 Writing Practice

[App page](https://appshunter.io/ios/app/german-b1-writing-practice/id6774985673)

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

**In-app purchases:** none


## Frequently asked questions

### Is Java Data Structures Pro free?

Java Data Structures Pro costs $4.99, with no in-app purchases.

### Is German B1 Writing Practice free?

German B1 Writing Practice is free to download, with no in-app purchases.

### Do Java Data Structures Pro or German B1 Writing Practice have ads?

Neither Java Data Structures Pro nor German B1 Writing Practice shows ads.

### Which is updated more often, Java Data Structures Pro or German B1 Writing Practice?

Java Data Structures Pro ships an update every 4 months, and German B1 Writing Practice fortnightly. Most recently, Java Data Structures Pro was updated on October 1, 2026 and German B1 Writing Practice on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*